nyctitropism

POS

Noun

HYPHEN

nyc=tit=ro=pism

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CIDE DICTIONARY

nyctitropism, n. [From Gr. ny`x, nykto`s, night + to turn.].

The tendency of certain plant organs, as leaves, to assume special “sleeping” positions or make curvatures under the influence of darkness. It is well illustrated in the leaflets of clover and other leguminous plants.

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