nyctitropism
/ˌnɪktɪˈtrəʊpɪz(ə)m/Botany
noun
= nyctinasty.
- Originally named nyctitropism, it was later renamed nyctinastism or nyctinasty, as a nastic movement rather than a directional tropism is involved..
Origin
Late 19th century; earliest use found in Charles Darwin (1809–1882), naturalist, geologist, and originator of the theory of natural selection. From nycti- + -tropism.