nyctinastismn.
/ˌnɪktᵻˈnastɪzm/, U.S. /ˌnɪktəˈnæsˌtɪz(ə)m/ Botany. rare.
= nyctinasty n.
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the world > plants > part of plant > growth, movement, or curvature of parts > [noun] > nastic movement
nyctinastism1906
seismonasty1912
nasty1924
nyctinasty1936
thermonasty1936
1906 New Phytologist 5 225 The opening and closing of flowers due to changes in illumination or in temperature are described respectively as photo- and thermonastic, and nyctitropism has been re-christened nyctinastism.
1921 J. Small Textbk. Bot. xxvi. 378 Nyctitropism or Nyctinastism includes the opening and closing of flowers.., also the rising and falling of leaves..in response to the stimulation of changes in temperature and light.
This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).
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n.1906