(n.) The tendency of growing plant organs to move or curve under the influence of light. In ordinary use the term is practically synonymous with heliotropism.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). phototropism. Retrieved September 28, 2026, from http://smartdefine.org/phototropism/definitions/2045023 |
| Chicago | Webster's. 2011. "phototropism" http://smartdefine.org/phototropism/definitions/2045023 (accessed September 28, 2026). |
| Harvard | Webster's 2011, phototropism, Smart Define, viewed 28 September, 2026, <http://smartdefine.org/phototropism/definitions/2045023>. |
| MLA | Webster's. "phototropism" 27 May 2011. Web. 28 September 2026. <http://smartdefine.org/phototropism/definitions/2045023> |