n. [ So named in allusion to the color of red corallin, fr. L. corallum coral. ] (Chem.) A yellow coal-tar dyestuff which probably consists chiefly of rosolic acid. See Aurin, and Rosolic acid under Rosolic. [ 1913 Webster ]

Red corallin, a red dyestuff which is obtained by treating aurin or rosolic acid with ammonia; -- called also pæonin. --
Yellow corallin. See Aurin. [ 1913 Webster ]

a. [ Cf. L. corallinus coralred. ] Composed of corallines; as, coralline limestone. [ 1913 Webster ]

n. [ Cf. F. coralline. ] 1. (Bot.) A submarine, semicalcareous or calcareous plant, consisting of many jointed branches. [ 1913 Webster ]

2. (Zool.) Formerly any slender coral-like animal; -- sometimes applied more particulary to bryozoan corals. [ 1913 Webster ]

n. (Paleon.) A fossil coralline. [ 1913 Webster ]