heliotaxis

[ hee-lee-oh-tak-sis ]
/ ˌhi li oʊˈtæk sɪs /

noun Biology.

movement of an organism toward or away from sunlight.

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Origin of heliotaxis

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

OTHER WORDS FROM heliotaxis

he·li·o·tac·tic [hee-lee-oh-tak-tik], /ˌhi li oʊˈtæk tɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for heliotaxis

heliotaxis
/ (ˌhiːlɪəʊˈtæksɪs) /

noun

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

Derived forms of heliotaxis

heliotactic (ˌhiːlɪəʊˈtæktɪk), adjective
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