[ foh-tuh-trop-ik, -troh-pik ]
/ ˌfoʊ təˈtrɒp ɪk, -ˈtroʊ pɪk /

adjective Botany.

growing toward or away from the light.
taking a particular direction under the influence of light.

Origin of phototropic

First recorded in 1895–1900; photo- + -tropic
Related formspho·to·trop·i·cal·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for phototropic