English

Definition of tropism noun from the Oxford Advanced Learner's Dictionary

 

tropism

 noun
noun
BrE BrE//ˈtrəʊpɪzəm//
 
, BrE//ˈtrɒpɪzəm//
 
; NAmE NAmE//ˈtroʊpɪzəm//
 
[uncountable] (biology)
 
jump to other results
the action of a living thing turning all or part of itself in a particular direction, towards or away from something such as a source of light Word Origin late 19th cent.: from Greek tropos ‘turning’ (from trepein ‘to turn’) + -ism.
See the Oxford Advanced American Dictionary entry: tropism