(n.) The influence of light on the movements of low organisms, as various infusorians, the zoospores of certain algae, etc.; also, the tendency to follow definite directions of motion or assume definite positions under such influence. If the migration is toward the source of light, it is termed positive phototaxis; if away from the light, negative phototaxis.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). phototaxy. Retrieved September 30, 2026, from http://smartdefine.org/phototaxy/definitions/2045013 |
| Chicago | Webster's. 2011. "phototaxy" http://smartdefine.org/phototaxy/definitions/2045013 (accessed September 30, 2026). |
| Harvard | Webster's 2011, phototaxy, Smart Define, viewed 30 September, 2026, <http://smartdefine.org/phototaxy/definitions/2045013>. |
| MLA | Webster's. "phototaxy" 27 May 2011. Web. 30 September 2026. <http://smartdefine.org/phototaxy/definitions/2045013> |