- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for nyctitropism
This will explain why attempts at explanation of the phenomenon of nyctitropism had hitherto proved so baffling.Life Movements in Plants, Volume II, 1919
Sir Jagadis Chunder Bose
- a tendency of some plant parts to assume positions at night that are different from their daytime positions
C19: nyct-, from Greek nukt-, nux night + -tropism