atomic number 69
Noun 1. a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime (synonym) thulium, Tm (hypernym) metallic element, metal (substance-holonym) apatite | ||||
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Atomic number 69 definition was found in categories: Language, Idioms & Slang(1)
Atomic number 69 Definition from Language, Idioms & Slang Dictionaries & Glossaries
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atomic number 69
atomic number 69
n : a soft silvery metallic element of the rare earth group; isotope 170 emits x-rays and is used in small portable x-ray machines; it occurs in monazite and apatite and xenotime [syn: thulium, tm]
atomic number 69
n : a soft silvery metallic element of the rare earth group; isotope 170 emits x-rays and is used in small portable x-ray machines; it occurs in monazite and apatite and xenotime [syn: thulium, tm]