phototropic


pho·tot·ro·pism

P0268900 (fō-tŏt′rə-pĭz′əm, fō′tō-trō′-)n. Growth or movement of a sessile organism toward or away from a source of light.
pho′to·tro′pic (fō′tə-trō′pĭk) adj.

pho•to•trop•ic

(ˌfoʊ təˈtrɒp ɪk, -ˈtroʊ pɪk)

adj. growing toward or away from the light. [1895–1900] pho`to•trop′i•cal•ly, adv.