Now updated for CSW19. New words, if any, and new inflections of existing words, are shown in red.
| actinide | any element of a group from element no. 89 (actinium) to 103 (lawrencium). |
| actinium | a radioactive metallic chemical element, atomic no. 89, the first element of the actinide series. |
| actinoid | any element of a group from element no. 89 (actinium) upwards. |
| actinon | an isotope of radon. |
| actinouranium | the isotope of uranium that has a mass number of 235. |
| airn | (Scots) iron; (verb) to iron. |
| alabamine | an alternative name for the element astatine. |
| aluminium | a light silvery malleable and ductile metallic element. |
| aluminum | a light silvery malleable and ductile metallic element. |
| alumium | (Obs.) aluminium, as first named by Sir Humphrey Davy. |
| americium | a chemical element. |
| antihydrogen | an antimatter form of hydrogen. |
| antimony | a brittle, bluish-white metallic element. |
| argental | of or pertaining to silver. |
| argentum | (Lat.) silver. |
| argon | an inert gaseous element. |
| arsenic | a metallic element. |
| arsenious | containing arsenic in the trivalent state. |
| astatine | a radioactive element of the halogen group. |
| auric | pertaining to, like or composed of gold. |
| aurify | to change into gold. |
| aurum | (Lat.) gold. |
| azote | an old name for nitrogen. |
| barium | a metallic element present in baryta. |
| berkelium | a radioactive, metallic element made artificially. |
| beryllium | a metallic element. |
| bismuth | a metallic element. |
| bismuthal | of or like bismuth. |
| bismuthic | containing bismuth in its higher valence; as, bismuthic oxide. |
| bohrium | a chemical element. |
| boric | of, pertaining to, or containing, boron. |
| boron | a relatively inert nonmetallic chemical element. |
| boronic | of or like boron. |
| brimstone | sulphur; esp (otherwise arch.) burning sulphur, (the fuel of) hellfire. |
| brimstony | containing or resembling brimstone. |
| bromic | relating to an acid derived from bromine. |
| bromin | a nonmetallic chlorine-like element found in seawater and mineral springs. |
| bromine | a nonmetallic chlorine-like element found in seawater and mineral springs. |
| cadmium | a metallic element. |
| caesium | a metallic element. |
| calcic | containing calcium. |
| calcium | a metallic element. |
| californium | an element. |
| carbon | a nonmetallic element. |
| cassiopeium | a former name for lutetium. |
| ceric | relating to the element cerium. |
| cerium | a metallic chemical element. |
| cerous | of or like cerium. |
| cesium | a metallic element. |
| chalcogen | an element from group VI(B) of the periodic table, namely sulphur, selenium or tellurium. |
| charcoal | a black amorphous form of carbon (verb) to draw or blacken with charcoal |
| charcoaly | like charcoal. |
| chlorin | a yellowish-green halogen gaseous element. |
| chlorine | a yellowish-green halogen gaseous element. |
| chromic | pertaining to, or obtained from, chromium. |
| chromium | a metallic element. |
| chromous | of chromium in lower valence. |
| cobalt | a metallic element. |
| cobaltous | containing cobalt in lower valence. |
| columbic | pertaining to, or containing, columbium or niobium. |
| columbium | a rare element of the vanadium group, now more commonly called niobium. |
| columbous | of or like niobium, a later name of columbium. |
| copernicium | a short-lived artificially produced radioactive element that has 112 protons. |
| copper | (Coll.) a metallic element (verb) to coat with copper |
| copperish | somewhat like copper. |
| coppery | containing copper, or made of copper > COPPERIER, COPPERIEST. |
| coronium | the name given to a hypothetical element in the sun's corona showing spectral lines now known to be due to iron and nickel that have lost large numbers of electrons. |
| crypton | (Greek) an element, an inert gas. |
| cuprum | (Lat.) copper. |
| curium | a chemical element, atomic no. 96. |
| darmstadtium | an artificially produced radioactive element. |
| deuterium | heavy hydrogen, an isotope of hydrogen of double mass. |
| dicalcium | containing two atoms of calcium. |
| didymium | a supposed element discovered in 1841, later resolved into neodymium and praseodymium. |
| diplogen | an alternative name for deuterium or heavy hydrogen. |
| dithiocarbamate | any of several sulfur analogs of the carbamates including some used as fungicides. |
| dubnium | an element produced by bombarding plutonium with high energy neon ions. |
| dysprosium | a rare-earth metal used in nuclear research. |
| einsteinium | a radioactive element produced artificially. |
| erbium | (Swedish) a rare metallic element. |
| etherion | a very light gas once supposed to exist in air. |
| europium | a rare-earth metal, atomic no. 63. |
| fermium | an artificially produced radioactive transuranic element. |
| ferreous | pertaining to or like iron. |
| ferrum | (Lat.) iron. |
| flerovium | an artificially produced radioactive transuranic element. |
| fluoric | pertaining to, obtained from, or containing, fluorine. |
| fluorin | a chemical element, no. 9, a greenish-yellow gas. |
| fluorine | an element, a greenish-yellow gas. |
| francium | a chemical element. |
| gadolinic | of or like gadolinium. |
| gadolinium | a rare metallic element found associated with yttrium and other rare metals. |
| gallium | a rare metallic element, found in certain zinc ores. |
| germanic | pertaining to, or containing, germanium. |
| germanium | a metallic element, much used in diodes and transistors as a semiconductor. |
| glucinic | pertaining to, derived from, or containing, glucinum (beryllium); as, glucinic oxide. |
| glucinium | a former name for beryllium. |
| glucinum | a former name for beryllium. |
| goldish | somewhat gold. |
| goldy | somewhat like gold (noun) a goldfinch |
| gox | gaseous oxygen. |
| hafnium | an element, atomic no 72. |
| hahnium | an artificially produced transuranic element. |
| halogen | any of the group of elements fluorine, chlorine, bromine, iodine, and astatine. |
| halogenic | resembling a halogen. |
| halogenoid | like a halogen. |
| halogenous | of the nature of a halogen. |
| hassium | an element synthetically produced by high-energy ion bombardment. |
| helium | a gaseous element. |
| helvetium | a superseded name for the element astatine. |
| holmic | relating to holmium, a metallic element. |
| holmium | a metallic element. |
| hydrargyral | relating to hydrargyrum, mercury. |
| hydrargyrum | an obsolete name for mercury. |
| hydrogen | a gaseous element. |
| illinium | a former name for promethium. |
| indium | a chemical element. |
| iodin | a chemical element. |
| iodinate | to treat with iodine. |
| iodine | a chemical element. |
| iridium | a chemical element. |
| iron | a metallic element; (verb) to smooth with an iron. |
| ironlike | like iron. |
| ironness | the state of being like iron. |
| joliotium | a former name for the element dubnium. |
| kalium | an old name for potassium. |
| krypton | (Greek) an element, an inert gas. |
| kurchatovium | a former name for rutherfordium, an artificially produced radioactive transuranic element. |
| lanthanide | a rare-earth element. |
| lanthanum | a rare element of the group of the earth metals, allied to aluminium. |
| lawrencium | a chemical element, atomic no. 103. |
| leady | resembling lead. |
| lithium | a chemical element. |
| livermorium | a transuranic element produced by bombarding curium with calcium-20 ions. |
| lutecium | a rare earth element. |
| lutetium | a rare earth element. |
| magnesic | relating to magnesia or magnesium. |
| magnesium | a bright silver-white metallic element. |
| manganese | a hard grey brittle chemical element, used in steels and magnetic alloys. |
| manganesian | like manganese. |
| masurium | a name proposed for element no. 43, now called technetium. |
| meitnerium | an artificially produced radioactive transuranic element. |
| mendelevium | a chemical element. |
| mercuric | containing bivalent mercury. |
| mercury | a metallic element. |
| mesothorium | an old name for either of two radioactive elements. |
| metalloid | an element intermediate in its properties between a typical metal and a typical nonmetal (eg boron, silicon, germanium). |
| metalloidal | intermediate in its properties between a typical metal and a typical nonmetal. |
| molybdenum | a rare element of the chromium group. |
| molybdic | of, pertaining to, or containing, molybdenum in higher valence. |
| moscovium | a highly radioactive element, of which only a few atoms have ever been produced. |
| muonium | an isotope of hydrogen. |
| natrium | sodium. |
| nebulium | an element formerly assumed to explain certain lines in the spectra of gaseous nebulae, now known to be due to states of oxygen and nitrogen not possible under earthly conditions. |
| neodymium | a rare metallic chemical element of the lanthanide series. |
| neon | a gaseous element. |
| neoned | illuminated by a neon light or lights. |
| neptunium | a radioactive metallic chemical element of the lanthanide series. |
| nickel | a white magnetic very malleable and ductile metallic element; (verb) to plate with nickel. |
| nihonium | a highly radioactive element, of which only a few atoms have ever been produced. |
| niobic | relating to the element niobium, now called columbium. |
| niobium | a later name of columbium. |
| niobous | containing niobium with a valency of less than five. |
| niton | an old name for the inert gas element radon. |
| nitrogen | a gaseous element. |
| nitrogenous | containing nitrogen. |
| nobelium | a name given to transuranic element 102. |
| nonaluminum NONALUMINIUM | not made of aluminum. |
| oganesson | a highly radioactive element, of which only a few atoms have ever been produced. |
| orthohydrogen | the form of molecular hydrogen, constituting about 75 per cent of the total at normal temperatures, in which the nuclei of the atoms spin in the same direction. |
| osmic | containing osmium in higher valency; relating to smells or to the sense of smell. |
| osmically | (Adv.) OSMIC, relating to the sense of smell. |
| osmium | a dense element. |
| oxygen | a gaseous element. |
| oxygenic | pertaining to, containing, or resembling, oxygen. |
| oxygenous | consisting of or containing oxygen. |
| ozonate | to treat or combine with ozone. |
| ozone | an allotropic form of oxygen present in the atmosphere. |
| ozonic | pertaining to ozone. |
| ozonisation | the act of treating with ozone. |
| ozonise | to treat or combine with ozone. |
| ozonize | to convert into or treat with ozone. |
| ozonous | pertaining to or containing, ozone. |
| palladic | of or containing palladium in the trivalent or tetravalent state. |
| palladious | containing palladium. |
| palladium | a metallic element resembling platinum a safeguard |
| palladous | containing palladium, a metallic element resembling platinum. |
| parahydrogen | a spin isomer of hydrogen. |
| phosphor | phosphorus; a phosphorescent or fluorescent substance generally. |
| phosphoric | of or like phosphorus. |
| phosphorus | a chemical element. |
| platina | (Spanish) platinum. |
| platinum | a metallic element. |
| plumbum | (Obs.) lead. |
| plutonium | a radioactive element. |
| polonium | a rare highly radioactive metallic chemical element, present in some uranium ores. |
| potassic | relating to potassium. |
| potassium | a silvery alkaline metallic element. |
| praseodymium | a chemical element, a metal with green salts, isolated from the once-supposed element didymium. |
| prometheum | the former name of promethium, a radioactive element. |
| promethium | a radioactive element. |
| protactinium | a radioactive metallic chemical element, a member of the actinide series which occurs as a decay product in uranium ores. |
| protium | ordinary hydrogen of atomic weight 1, as distinct from deuterium and tritium. |
| protoactinium | a radioactive element that yields actinium on disintegration. |
| quicksilver | an old name for mercury (verb) to coat with quicksilver |
| quicksilverish | somewhat like quicksilver. |
| radiocarbon | a radioactive isotope of carbon, specif carbon-14. |
| radioelement | a radioactive element. |
| radiogold | the radioisotope gold-198. |
| radioiodine | a radioisotope of iodine with medical uses. |
| radiophosphorus | a radioactive isotope of phosphorus. |
| radiostrontium | a radioactive isotope of strontium, esp strontium-90. |
| radium | a radioactive element. |
| radon | an inert gas. |
| rhenium | a chemical element of the transition series, atomic no. 75, that occurs naturally in molybdenum ores and is used in superconducting alloys. |
| rhodic | of or pertaining to rhodium. |
| rhodium | a very hard silvery-white metallic chemical element, belonging to the platinum group. |
| rhodous | of rhodium in lower valency. |
| roentgenium | a short-lived radioactive element produced artificially. |
| rubidic | of or pertaining to rubidium; containing rubidium. |
| rubidium | a chemical element. |
| ruthenic | of or containing, ruthenium, esp with a higher valency. |
| ruthenious | pertaining to, or containing, ruthenium. |
| ruthenium | a metallic element of the platinum group. |
| rutherfordium | an artificially produced radioactive transuranic element. |
| samarium | a metallic element observed spectroscopically in samarskite. |
| scandic | of or pertaining to scandium. |
| scandium | a rare metallic element of the boron group. |
| seaborgium | an element. |
| selenium | a nonmetallic solid element used in photoelectric cells. |
| semimetal | a metal that is not malleable. |
| semimetallic | of the nature of a semimetal. |
| siderophile | an element with an affinity for iron, whose geochemical distribution is influenced by this property. |
| siderophilic | of or like a siderophile, an element with an affinity for iron. |
| silicium | the original name of the element silicon. |
| silicon | a nonmetallic element. |
| silver | a metallic element (adj.) like silver (verb) to cover with silver |
| silverly | (Adv.) SILVER, like silver. |
| sodic | of or pertaining to sodium. |
| sodicity | the quality of being sodic, containing sodium. |
| sodium | a metallic element. |
| stannum | (Lat.) the technical name of tin. |
| stibial | pertaining to antimony. |
| stibium | (Lat.) antimony. |
| strontia | an oxide of the metal strontium. |
| strontic | containing, or designating the compounds of, strontium. |
| strontium | a metallic element of the calcium group. |
| sulfo | denoting sulphur. |
| sulfur | sulphur (verb) to treat with sulfur |
| sulfury | resembling, or partaking of the nature of, sulphur > SULFURIER, SULFURIEST. |
| sulphur | a yellow, very brittle, fusible and inflammable nonmetallic element; (verb) to impregnate with sulphur |
| sulphury | resembling, or partaking of the nature of, sulphur > SULPHURIER, SULPHURIEST. |
| tantalous | of or containing trivalent tantalum. |
| tantalum | an acid-resistant metallic element, useful for electronic and surgical parts. |
| technetium | a chemical element. |
| tellurium | a rare chemical element, a silvery-white brittle metalloid resembling selenium. |
| tennessine | a highly radioactive element, of which only a few atoms have ever been produced. |
| terbic | (Swedish) pertaining to terbium. |
| terbium | (Swedish) a rare metal found in certain yttrium minerals. |
| thallious | containing thallium. |
| thallium | a rare bluish-white metallic chemical element. |
| thoric | of or pertaining to thorium; designating the compounds of thorium. |
| thoron | the radioactive isotope of radon given off by the decomposition of thorium. |
| thulia | the sesquioxide of thulium, a dense white powder from which thulium is obtained. |
| thulium | a rare metallic chemical element of the lanthanide series. |
| tin | a metallic element (verb) to coat with tin |
| tinlike | like tin. |
| tinniness | the state of being tinny. |
| titanium | a metallic element. |
| titanous | of trivalent titanium. |
| transactinide | any element of a group from element no. 104 to 118 (ununoctium, as yet undiscovered). |
| transuranian | of an element, having an atomic number greater than that of uranium. |
| transuranic | denoting any chemical element having atomic number beyond uranium (92), not occuring in nature but artificially produced by bombardment of atoms. |
| transuranium | of an element, having an atomic number greater than that of uranium. |
| trioxygen | a technical name for oxygen. |
| tritium | an isotope of hydrogen with mass number 3. |
| tungsten | a metallic element. |
| tungstic | of or pertaining to tungsten, as tungstic oxide. |
| unnilhexium | a chemical element, aka seaborgium. |
| unnilpentium | a former name of the transuranic element dubnium. |
| unnilquadium | a former name of the transuranic element rutherfordium. |
| unnilseptium | a former name of the transuranic element bohrium. |
| ununbium | a chemical element. |
| unununium | a chemical element. |
| uranide | a transuranic element. |
| uranium | an element of the chromium group. |
| vanadic | derived from or containing vanadium, esp in its higher (trivalent) oxidation state. |
| vanadium | a silvery metallic element. |
| vanadous | of vanadium in lower valency. |
| virginium | a name proposed for chemical element no 87, now called francium. |
| wolfram | (Ger.) an alternative name for tungsten. |
| xenon | an inert gas. |
| ylem | a form of matter hypothesized by proponents of the big bang theory to have existed before the formation of the chemical elements. |
| ytterbic | pertaining to, or derived from, ytterbium. |
| ytterbium | (Swedish) a rare element of the boron group. |
| yttric | (Swedish) pertaining to, derived from, or containing, yttrium. |
| yttriferous | (Swedish) of an ore, bearing yttrium. |
| yttrious | (Swedish) pertaining to, derived from, or containing, yttrium. |
| yttrium | (Swedish) a rare earth element. |
| zinc | a metallic element (verb) to coat with zinc |
| zincic | pertaining to, containing, or resembling, zinc. |
| zincify | to coat or impregnate with zinc. |
| zinckify | to coat or impregnate with zinc. |
| zincky | of or like zinc. |
| zincoid | like zinc. |
| zincous | relating to or like zinc. |
| zincy | of or like zinc. |
| zinkify | to coat or impregnate with zinc. |
| zinky | of or like zinc. |
| zirconic | of zirconium. |
| zirconium | a rare element of the carbon-silicon group. |