Nyctitropic

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Nyctitropic \Nyc`ti*trop"ic\, a. [From Gr. ny`x, nykto`s, night
     + ? turning.] (Bot.)
     Turning or bending at night into special positions.
     [1913 Webster]
  
     Note: Nyctitropic movements of plants usually consist in a


           folding or drooping of the leaves, the advantage being
           in lessening the radiation of heat.
           [1913 Webster]