Rĕt'in-ite, n.

(49), n. [Fr. rétinite, from Gr. ῥητίνη, resin.] (Min.) A mineral resin, usually of a yellowish-brown, sometimes of a green, yellow, or red color, found in roundish masses, sometimes with coal. It is inflammable, and is chiefly composed of vegetable resin and bitumen. Dana.