[ih-tur-bee-uh m] /ɪˈtɜr bi əm/
noun, Chemistry
a rare metallic element found in gadolinite and forming compounds resembling those of yttrium. Symbol: Yb; atomic weight: 173.04; atomic number: 70; specific gravity: 6.96.
1875–80; < Neo-Latin; see ytterbia, -ium
Related forms
ytterbic, ytterbous, adjective
Example Sentences for ytterbium
Ytterbium is readily attacked and dissolved by dilute and concentrated mineral acids and reacts slowly with water.
British Dictionary definitions for ytterbium
ytterbium (ɪˈtɜːbɪəm)
a soft malleable silvery element of the lanthanide series of metals that occurs in monazite and is used to improve the mechanical properties of steel. Symbol: Yb; atomic no: 70; atomic wt: 173.04; valency: 2 or 3; relative density: 6.903 (alpha), 6.966 (beta); melting pt: 819°C; boiling pt: 1196°C
[C19: New Latin; see ytterbia]

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Word Origin and History for ytterbium
metallic rare-earth element, 1879, coined in Mod.L. by Swed. chemist Carl Gustaf Mosander (1797-1858) from Ytterby, name of a town in Sweden where it was discovered.
Online Etymology Dictionary, © 2010 Douglas Harper
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ytterbium in Medicine

ytterbium yt·ter·bi·um (ĭ-tûr'bē-əm)
Symbol Yb
A soft bright allotropic rare-earth element. Atomic number 70; atomic weight 173.04; melting point 824°C; boiling point 1,194°C; specific gravity 6.97 or 6.90 (25°C) depending on allotropic form; valence 2, 3.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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ytterbium in Science
Symbol Yb
A soft, silvery-white metallic element of the lanthanide series that occurs as seven stable isotopes. It is used as a radiation source for portable x-ray machines. Atomic number 70; atomic weight 173.04; melting point 824°C; boiling point 1,196°C; specific gravity 6.972 or 6.54 (25°C) depending on allotropic form; valence 2, 3. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for ytterbium

((Yb), chemical element, rare-earth metal of the lanthanoid series of the periodic table, a low-melting-point, divalent rare earth with little commercial use.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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