hygroscope Hear it!

hygroscope definition

hygro·scope (hī′grō skōp′, -grə-)

noun

an instrument that indicates, without actually measuring, changes in atmospheric humidity, as by swelling or color change

Etymology: hygro- + -scope

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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