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nyctitropism

[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

Related forms

nyc·tit·ro·pism

[nik-ti-truh-piz-uhm] , noun

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Nyctitropism is always a great word to know.

So is ninnyhammer. Does it mean:

a fool or simpleton; ninny.

an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.

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Collins

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*

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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nyctitropism

nyc·ti·trop·ic