A refractile substance composed of chromatin, thought to be a non-glycogen food reserve contained within the cytoplasm of certain protozoa; seen in cysts of Entamoeba histolytica as rounded bars or chromatoidal bodies in contrast to the splintery form of chromatoid bodies in cysts of Entamoeba coli.

Origin: chromato-+ G. Eidos, form

(05 Mar 2000)