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Webster 1913 Edition

Adj.

[From Gr.

νύξ

νυκτός

, night + [GREEK] turning.]

(Bot.)

Turning or bending at night into special positions.

☞ Nyctitropic movements of plants usually consist in a folding or drooping of the leaves, the advantage being in lessening the radiation of heat.

nyctitropic ‎(not comparable)

(botany) Turning or bending at night into special positions.
Nyctitropic movements of plants usually consist in a folding or drooping of the leaves, the advantage being in lessening the radiation of heat.