Nyctitropic
Pronunciation : Nyc`ti*trop"ic
Part of Speech : a.
Etymology : [From Gr. (Bot.)
Definition : Defn: Turning or bending at night into special positions.
Note: Nyctitropic movements of plants usually consist in a folding or drooping of the leaves, the advantage being in lessening the radiation of heat.
Source : Webster's Unabridged Dictionary, 1913