'Epinastic' definitions:

Definition of 'Epinastic'

From: 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]