phototropism

Definitions

  • WordNet 3.6
    • n phototropism an orienting response to light
    • ***
Webster's Revised Unabridged Dictionary
    • Phototropism (Microbiology) exhibiting movement in a direction toward (positive phototropism) or away from (negative phototropism) a source of light.
    • Phototropism (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.
    • ***
Century Dictionary and Cyclopedia
    • n phototropism The growth or the bending of organisms or of parts of organisms in relation to light; heliotropism.
    • n phototropism Same as phototaxis, 2.
    • n phototropism Same as phototropy, 2.
    • ***

Etymology

Webster's Revised Unabridged Dictionary
Photo-, + Gr. to turn

Usage

In literature:

I shall now describe the phototropic effect of unilateral light in pulvinated, and in growing organs.
"Life Movements in Plants, Volume II, 1919" by Sir Jagadis Chunder Bose
***

In news:

Single Page ( iStock Photo/phototropic ).
***