[nik-ti-trop-ik, -troh-pik]
adjective Botany.
  1. tending to assume at or just before nightfall positions unlike those maintained during the day, as the leaves or flowers of certain plants.

Origin of nyctitropic

First recorded in 1875–80; nycti- + -tropic
Related formsnyc·tit·ro·pism [nik-ti-truh-piz-uh m] /nɪkˈtɪ trəˌpɪz əm/, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for nyctitropism

Historical Examples of nyctitropism

British Dictionary definitions for nyctitropism


  1. a tendency of some plant parts to assume positions at night that are different from their daytime positions
Derived Formsnyctitropic (ˌnɪktɪˈtrɒpɪk), adjective

Word Origin for nyctitropism

C19: nyct-, from Greek nukt-, nux night + -tropism
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