English dictionary
thulium
/'/T//u/l/i//@/m/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
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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
Source: WordNet 3.0
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A rare metallic element of uncertain properties and identity, said to have been found in the mineral gadolinite.
Source: webster1913