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Webster 1913 Edition
Nyctitropic
Nycˊti-trop′ic
,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.