A bright, silvery chemical element, one of the rare-earth elements: symbol, Tm; at. no. 69
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
Find another word for tm. In this page you can discover 2 synonyms, antonyms, idiomatic expressions, and related words for tm, like: thulium and atomic number 69.