heliotaxis Hear it!

heliotaxis definition

he·lio·taxis (hē′lē ō tak′sis)

noun

the positive, or negative, response of a freely moving organism toward, or away from, sunlight

Etymology: ModL: see helio- & taxis

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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