thulium

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Related to Element 69: Element 70

thu·li·um

 (tho͞o′lē-əm)
n. Symbol Tm
A bright, soft, silvery, metallic element of the lanthanide series obtained commercially from the mineral monazite, having an x-ray emitting isotope that is used in portable medical x-ray units. Atomic number 69; atomic weight 168.934; melting point 1,545°C; boiling point 1,950°C; specific gravity 9.321 (at 25°C); valence 2, 3. See Periodic Table.

[After Thule1.]

thulium

(ˈθjuːlɪəm)
n
(Elements & Compounds) a malleable ductile silvery-grey element occurring principally in monazite. The radioisotope thulium-170 is used as an electron source in portable X-ray units. Symbol: Tm; atomic no: 69; atomic wt: 168.93421; valency: 3; relative density: 9.321; melting pt: 1545°C; boiling pt: 1950°C
[C19: New Latin, from Thule + -ium]

thu•li•um

(ˈθu li əm)

n.
a rare-earth metallic element found in gadolinite and other uncommon minerals. Symbol: Tm; at. wt.: 168.934; at. no.: 69; sp. gr.: 9.32.
[< French (1879), after Thule, taken as a name for ancient Scandinavia; see -ium2]

thu·li·um

(tho͞o′lē-əm)
Symbol Tm A soft, easily shaped, silver-gray metallic element of the lanthanide series. An artificial radioactive isotope of thulium is used as a radiation source in small, portable x-ray machines. Atomic number 69. See Periodic Table.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.thulium - a soft silvery metallic element of the rare earth groupthulium - 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
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
apatite - a common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate; a source of phosphorus
monazite - a reddish-brown mineral containing rare earth metals; an important source of thorium and cerium
xenotime - a brown-to-yellow mineral that is a phosphate of yttrium in crystalline form
Translations
тулий
thulium
thulium
tulio
tuulium
tulium
thulium
תוליום
tulij
túlium
túlín
ツリウム
thulium
tulis
thulium
thulium
tul
túlio
tuliu
thulium
tulij
tulium
tulyum
tuli

thulium

[ˈθjuːlɪəm] Ntulio m

thulium

n (Chem) → Thulium nt