nyctinasty

/ (ˈnɪktɪˌnæstɪ) /

noun

botany a nastic movement, such as the closing of petals, that occurs in response to the alternation of day and night

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Derived forms of nyctinasty

nyctinastic, adjective

Word Origin for nyctinasty

C20: from Greek nukt-, nux night + -nasty
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