yttrium: Meaning and Definition of

yt•tri•um

Pronunciation: (i'trē-um), [key]
— n. Chem.
  1. a rare trivalent metallic element, found in gadolinite and other minerals. Symbol: Y; at. wt.: 88.905; at. no.: 39; sp. gr.: 4.47. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
yttriferous yttrium metal
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