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nastic movement

/ ˈnæstɪk /

noun

  1. a response of plant parts that is independent of the direction of the external stimulus, such as the opening of buds caused by an alteration in light intensity
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of nastic movement1

C19 nastic, from Greek nastos close-packed, from nassein to press down

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