retinal rod

English Thesaurus

1. a visual receptor cell that is sensitive to dim light (noun.body)

hypernym	:	visual cell,
definition	:	one of the cells of the retina that is sensitive to light (noun.body)

part holonym	:	retinal purple, rhodopsin, visual purple,
definition	:	a red photopigment in the retinal rods of vertebrates; dissociates into retinene by light (noun.substance)

part meronym	:	retina,
definition	:	the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve (noun.body)