thulium
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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.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Noun | 1. | thulium - 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 |
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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
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
thulium
n (Chem) → Thulium nt
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007