phototropism
/fəʊˈtɒtrəʊˌpɪzəm/noun
mass noun
- Biology the orientation of a plant or other organism in response to light, either towards the source of light (positive phototropism) or away from it (negative phototropism)【生】（植物或其他生物体的）向光性。比较HELIOTROPISM, PHOTOTAXIS.
派生词