You searched for: “nyctitropism
nyctitropism
An orientation response occurring at night or turning in a certain direction at night; nyctitropic, nyctitropism.

The tendency of certain plant organs, as the leaflets of clover, to assume special “sleeping” positions at night.

This entry is located in the following units: -ism, -ismus (page 38) nycti-, nyct-, nycto-, nyc- + (page 2)