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 nastic; from 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.