designating, of, or exhibiting movement or change in position of a plant or its parts, as in the opening and closing of flowers, in response to a stimulus but independent of the direction of the stimulus and caused by unequal growth of certain cells, changes in light intensity, etc.
Origin of nasticfrom Classical Greek nastos, pressed close from nassein, to press, squeeze close + -ic
nastic by some (specified) means or in some (specified) direction: epinastic, hyponastic
Of or relating to a movement of a plant that is in response to an external stimulus but is in a direction independent of the direction of the stimulus, as in the diurnal movement of leaves.
Origin of nasticGreek nastos pressed close ( from nassein to press ) -ic