retinal cone vs visual cell

retinal cone and visual cell both are nouns.

Word	Noun	Adjective	Verb	Adverb
retinal cone	Yes	No	No	No
visual cell	Yes	No	No	No

As nouns, visual cell is a hypernym of retinal cone; that is, visual cell is a word with a broader meaning than retinal cone:

retinal cone: a visual receptor cell in the retina that is sensitive to bright light and to color
visual cell: one of the cells of the retina that is sensitive to light

retinal cone (noun)	visual cell (noun)
a visual receptor cell in the retina that is sensitive to bright light and to color	one of the cells of the retina that is sensitive to light