a. (Anat.) Of or pertaining to the retina. [ 1913 Webster ]
Retinal purple (Physiol. Chem.),
n. (Chem.) A retinoid compound (
n. [ Gr. &unr_;&unr_;&unr_;&unr_; resin + -lite. ] (Min.) A translucent variety of serpentine, of a honey yellow or greenish yellow color, having a waxy resinlike luster. [ 1913 Webster ]