an orange pigment, C 2 0 H 2 8 O, that is the active component of rhodopsin and is liberated upon the absorption of light in the vision cycle; vitamin A aldehyde.
the aldehyde form of the polyene retinol (vitamin A) that associates with the protein opsin to form the visual purple pigment rhodopsin
retinene ret·i·nene (rět’n-ēn’)
Either of two yellow to red retinal pigments, formed by oxidation of vitamin A alcohols.
retinal ret·i·nal (rět’n-āl’, -ôl’)
retinene1 n. See retinaldehyde.
retinene2 n. See dehydroretinaldehyde.
noun, Mineralogy. 1. any of various fossil resins, especially one derived from brown coal. noun 1. any of various resins of fossil origin, esp one derived from lignite
noun, Ophthalmology. 1. inflammation of the retina. noun 1. inflammation of the retina retinitis ret·i·ni·tis (rět’n-ī’tĭs) n. Inflammation of the retina.