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astatine definition

☆ as·ta·tine (as′tə tēn′, -tin′)

noun

a radioactive chemical element, one of the halogens, formed from bismuth when it is bombarded by alpha particles: it resembles iodine in its chemical properties: symbol, At; at. no., 85

Etymology: < Gr astatos, unstable + -ine

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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