American English

Definition of phototropism noun from the Oxford Advanced American Dictionary

 

phototropism

 noun
noun
NAmE//ˌfoʊt̮əˈtroʊpɪzəm//
 
, NAmE//foʊˈtɑtrəˌpɪzəm//
 
[uncountable] (biology)
 
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the action of a plant turning toward or away from light
phototropic
 
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NAmE//ˌfoʊt̮əˈtroʊpɪk//
 
, NAmE//ˌfoʊt̮əˈtrɑpɪk//
 
adjective
See the Oxford Advanced Learner's Dictionary entry: phototropism