uranium: Meaning and Definition of


Pronunciation: (yoo-rā'nē-um), [key]
— n. Chem.
  1. a white, lustrous, radioactive, metallic element, occurring in pitchblende, and having compounds that are used in photography and in coloring glass. The 235 isotope is used in atomic and hydrogen bombs and as a fuel in nuclear reactors. Symbol: U; at. wt.: 238.03; at. no.: 92; sp. gr.: 19.07.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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