Definition of nyctitropism
: a sleep movement in plants characterized by response to a stimulus that is greatest or exclusively from one direction — compare nyctinasty
Join MWU now and get access to America’s largest dictionary, with:
- 300,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of nyctitropism
International Scientific Vocabulary nyct- + -tropism
Seen and Heard
What made you want to look up nyctitropism? Please tell us where you read or heard it (including the quote, if possible).