[ nik-ti-trop-ik, -troh-pik ]
/ ˌnɪk tɪˈtrɒp ɪk, -ˈtroʊ pɪk /

adjective Botany.

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 forms

nyc·tit·ro·pism [nik-ti-truh-piz-uh m] /nɪkˈtɪ trəˌpɪz əm/, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for nyctitropism

British Dictionary definitions for nyctitropism


/ (nɪkˈtɪtrəˌpɪzəm) /


a tendency of some plant parts to assume positions at night that are different from their daytime positions

Derived Forms

nyctitropic (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