atomic number 57
Noun 1. a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth (synonym) lanthanum, La (hypernym) metallic element, metal | ||||
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Atomic number 57 definition was found in categories: Language, Idioms & Slang(1)
Atomic number 57 Definition from Language, Idioms & Slang Dictionaries & Glossaries
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atomic number 57
atomic number 57
atomic number 71 n : a trivalent metallic element of the rare earth group; usually occurs in association with yttrium [syn: lutetium, lutecium, lu]
atomic number 57
atomic number 71 n : a trivalent metallic element of the rare earth group; usually occurs in association with yttrium [syn: lutetium, lutecium, lu]