nyctinasty
(redirected from nyctinastic)Also found in: Medical, Encyclopedia.
Related to nyctinastic: nyctinasty
nyc·ti·nas·ty
(nĭk′tĭ-năs′tē)n.
A diurnal movement of plant parts, such as the opening during the day and closing during the night of certain flowers.
nyc′ti·nas′tic (-tĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
nyctinasty
(ˈnɪktɪˌnæstɪ)n
(Botany) botany a nastic movement, such as the closing of petals, that occurs in response to the alternation of day and night
[C20: from Greek nukt-, nux night + -nasty]
ˌnyctiˈnastic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014