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heliotaxis

[hee-lee-oh-tak-sis]

noun

Biology.

  1. movement of an organism toward or away from sunlight.

heliotaxis

/ ˌhiːlɪəʊˈtæksɪs, ˌhiːlɪəʊˈtæktɪk /

noun

  1. movement of an entire organism in response to the stimulus of sunlight

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Other Word Forms

  • heliotactic adjective
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Word History and Origins

Origin of heliotaxis1

First recorded in 1895–1900; helio- + -taxis

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heliostatheliotherapy

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