Coralline \Cor"al*line\ (? or ?), a. [Cf. L. corallinus coralred.] Composed of corallines; as, coralline limestone. Coralline \Cor"al*line\, n. [Cf. F. coralline.] 1. (Bot.) A submarine, semicalcareous or calcareous plant, consisting of many jointed branches. 2. (Zo["o]l.) Formerly any slender coral-like animal; -- sometimes applied more particulary to bryozoan corals.