Thulium

[θju:liәm]

Definition

(noun.) 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.

Typist: Moira--From WordNet

Definition

(n.) A rare metallic element of uncertain properties and identity, said to have been found in the mineral gadolinite.

Inputed by Clara

Examples

Checked by Alissa

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