See Also: phototropism(medicine)
phototropism(dictionary)

phototropism (iou)



phototropism noun. L19.
[from PHOTO- + -TROPISM.]
1. Biology. The directional bending or growth of a plant or a sessile animal in response to light; an instance of this. Also = PHOTOTAXIS. L19.
2. = PHOTOCHROMISM. E20.
Also phototropy noun E20.