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nastic

Pronunciation: /ˈnastɪk/

Definition of nastic

adjective

Botany
  • (of the movement of plant parts) caused by an external stimulus but unaffected in direction by it.

Origin:

early 20th century: from Greek nastos 'squeezed together' (from nassein 'to press') + -ic

nastic in other Oxford dictionaries

Definition of nastic in the US English dictionary

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