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phototropism
CIDE DICTIONARY
phototropism, n. [Photo- + Gr. to turn.].
- 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.]
- exhibiting movement in a direction toward (
positive phototropism ) or away from (negative phototropism ) a source of light. [PJC]
OXFORD DICTIONARY
phototropism, n. the tendency of a plant etc. to bend or turn towards or away from a source of light.
Derivative
phototropic adj.
For further exploring for "phototropism" in Webster Dictionary Online
