rod cell
/ˈrɒd sɛl/noun
1Any of various kinds of cell with a rod-like shape or constituent, or forming part of a rod-shaped organ or structure; (in flatworms) a cell which secretes rhabdoids. Now rare.
2An elongated light-sensitive cell in the retina; = rod.
Origin
Mid 19th century; earliest use found in British and Foreign Medico-chirurgical Review. From rod + cell.