Found 2 items, similar to Phototropism.
English → English (WordNet) Definition: phototropism phototropism n : an orienting response to light
English → English (gcide) Definition: Phototropism Phototropism \Pho*tot"ro*pism\, n. [Photo- + Gr. ? to turn.] 1. (Plant Physiol.) 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 1913 Suppl.] 2. (Microbiology) exhibiting movement in a direction toward (positive phototropism) or away from (negative phototropism ) a source of light. [PJC]