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

transpiration

noun
 
/ˌtrænspɪˈreɪʃn/
 
/ˌtrænspɪˈreɪʃn/
[uncountable] (biology)
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  1. the process of water passing out from the surface of a plant or leaf compare perspiration
See transpiration in the Oxford Advanced American Dictionary
trait
noun
 
 
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