nyctitropic

nyctitropic

[nik-ti-trop-ik, -troh-pik]
adjective Botany.
tending to assume at or just before nightfall positions unlike those maintained during the day, as the leaves or flowers of certain plants.

Origin:
1875–80; nycti- + -tropic

nyctitropism [nik-ti-truh-piz-uhm] , noun
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World English Dictionary
nyctitropism (nɪkˈtɪtrəˌpɪzəm)
 
n
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]
 
nyctitropic
 
adj

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