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

Other Word Forms

• heliotactic adjective

Word History and Origins

Origin of heliotaxis¹

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