deuterium Hear it!

deuterium definition

☆ deu·teri·um (do̵̅o̅ tir′ē əm, dyo̵̅o̅-)

noun

a hydrogen isotope used in nuclear reactors, accelerators, etc.: symbol, D; at. wt., 2.0141

Etymology: ModL: see deutero- & -ium

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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