rod

Stedman's Medical Dictionary: A Practical Medical Dictionary · 1920 · p. 30

[A.S. rod.] i. straight slender cylindrical formation. 2. One of the rhodopsin-containing cells forming with the cones the layer of rods and cones of the retina. Corti's r., see Corti. enam'el r., one of the enamel prisms of a tooth. r. bacte'ria, bacilli.