Meaning of terbium

ter•bi•um

Pronunciation: (tûr'bē-um), [key]
— n. Chem.
  1. a rare-earth, metallic element present in certain minerals and yielding colorless salts. Symbol: Tb; at. no.: 65; at. wt.: 158.924; sp. gr.: 8.25.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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