ALL meanings of tropism
tro·pism
T t - noun tropism an orientation of an organism to an external stimulus, as light, especially by growth rather than by movement. 1
- noun tropism the response of an organism, esp a plant, to an external stimulus by growth in a direction determined by the stimulus 0
- noun tropism the positive, or negative, attraction of a plant or sessile animal toward, or away from, a stimulus, as in the turning of a sunflower toward the light 0