backswimmer Hear it!

backswimmer definition

back·swim·mer (-swim′ər)

noun

any of a family (Notonectidae) of hemipterous water bugs that swim rapidly on their back by use of their long, oarlike legs

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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