n. One of several yellow or red carotenoid pigments formed from rhodopsin by the action of light; retinene
the GNU version of the Collaborative International Dictionary of English
adj. Of or pertaining to the retina.
n. A retinoid compound (C20H28O), closely related to vitamin A, which is a component of the visual pigments in the eye. It is also called retinaldehyde and vitamin A aldehyde.
The Century Dictionary and Cyclopedia
Of or pertaining to the retina: as, retinal structure; retinal expansion; retinal images.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. in or relating to the retina of the eye
n. either of two yellow to red retinal pigments formed from rhodopsin by the action of light
Word Usage
"For more spectacular photos, you can browse through this database in retinal ecstasy."