nyctitropism
noun
nyc·tit·ro·pism
\nikˈti‧trəˌpizəm\
Definition of nyctitropism
-s
: a sleep movement in plants characterized by response to a stimulus that is greatest or exclusively from one direction — compare nyctinasty
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Origin and Etymology of nyctitropism
International Scientific Vocabulary nyct- + -tropism
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