The Collaborative International Dictionary
Epinastic
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.
Wiktionary
epinastic
a. of, or relating to epinasty
Usage examples of "epinastic".
In only one genus, Cannabis, did the leaves sink in the evening, and Kraus attributes this movement to the prepotency of their epinastic growth.
Oxalis carnosa: movements of flowerpeduncle, traced on a vertical glass: A, epinastic downward movement.
We thus see that the subpeduncle oscillated up and down, or circumnutated, during its whole downward epinastic course.