actinon Hear it!

actinon definition

ac·ti·non (ak′tə nän′)

noun

a gaseous radioisotope of radon, formed by disintegration of actinium: at. no., 86; at. wt., 219; half-life of 3.92 seconds

Etymology: ModL < actinium + -on

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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