pho·tot·ro·pism /foˈtɑtrəˌpɪzəm/
屈光性,向光性
pho·tot·ro·pism /foˈtɑtrəˌpɪzəm, ˌfotoˈtroˌpɪzəm/ 名詞
向光性,趨光性
Pho·tot·ro·pism n.
1. 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.
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phototropism
n : an orienting response to light