Definition of Atomic Number 69 in English :
Define Atomic Number 69 in English
Atomic Number 69 meaning in English
Meaning of Atomic Number 69 in English
Pronunciation of Atomic Number 69 in English
Atomic Number 69 pronunciation in English
Pronounce Atomic Number 69 in English
Atomic Number 69
see synonyms of atomic number 69Noun
1. atomic number 69, thulium, tm
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
WordNet Lexical Database for English. Princeton University. 2010.