hassium Hear it!

hassium definition

has·sium (has′ē əm)

noun

a radioactive chemical element with a very short half-life: a transactinide produced by bombarding lead with high-energy nuclear particles: symbol, Hs: at. no., 108

Etymology: ModL, after the L name for Hesse, where new elements were created in a nuclear physics laboratory + -ium

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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