heliotaxis

[hee-lee-oh-tak-sis]

Origin of heliotaxis

First recorded in 1895–1900; helio- + -taxis
Related formshe·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. 2018

British Dictionary definitions for heliotaxis

heliotaxis

noun
  1. movement of an entire organism in response to the stimulus of sunlight
Derived Formsheliotactic (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