'Phototropism' definitions:
Definition of 'phototropism'
(from WordNet)
noun
An orienting response to light
Definition of 'Phototropism'
From: GCIDE
- 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]