kentromorphism

n. [Gr. kentor, piercer; morphe, form]

(ARTHROPODA: Insecta)

A change brought about by environmental stimuli (high or low population density) in phasmatids, locusts, the larva of Lepidoptera and a few other insects, that cause coloration and pattern differences, anatomical proportions, physiology and behavioral differences; see gregaria, solitaria.