Pho*tot"ro*pism (?), n. [Photo- + Gr. &?; to turn.] (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.

Pho*tot"ro*pism (?), n. [Photo- + Gr. &?; to turn.] (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.