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: T Tæ Tê T- T. Ta Tb Tc Td Te Th Ti Tj Tk Tl Tm Tn To Tp Tr Ts Tt Tu Tv Tw Tx Ty Tz

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OXFORD DICTIONARY

thulium

Noun

thu=li=um

WORDNET DICTIONARY

thulium(n = noun.substance) atomic number 69, 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; Array

is a kind of metal, metallic element

thulium, n. [NL. See Thule.].

A rare metallic element of uncertain properties and identity, said to have been found in the mineral gadolinite. [1913 Webster]

thulium, n. Chem. a soft metallic element of the lanthanide series, occurring naturally in apatite.

Usage

Symb.: Tm.

Etymology

mod.L f. L Thule name of a region in the remote north

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