Epinastic

1 definition found

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

  Epinastic \Ep`i*nas"tic\, a. [Pref. epi- + Gr. ? pressed close.]
     (Physiol.)
     A term applied to that phase of vegetable growth in which an
     organ grows more rapidly on its upper than on its under
     surface. See {Hyponastic}.
     [1913 Webster]