Advertisement

thulium (n.)

1879, Modern Latin, from thulia (thulite), name of an earth found in Scandinavia, from which the element was identified in 1879 by Swedish geologist Per Tedor Cleve (1840-1905), from Thule, which sometimes was identified as Scandinavia. With metallic element ending -ium.

Others are reading

Advertisement
Definitions of thulium from WordNet

thulium (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;
Synonyms: Tm / atomic number "
From wordnet.princeton.edu