n. A small fleshy excrescence, either natural or morbid. Specificallyn. In ornithology, a fleshy excrescence on the head of a bird, as the comb or one of the wattles of a hen.n. In botany, a protuberance surrounding the hilum of a seed. Strictly, it is an outgrowth of the micropyle, or external orifice of the ovule.n. In entomology, a naked, more or less rounded, fleshy elevation of the surface, especially on the body of a caterpillar or other insect-larva.n. A small horny protuberance, at the tip of a young bird's beak, which serves to break the egg-shell at the time of hatching: same as egg-tooth.n. A peculiar leaf-like sense-organ found on the dorsal side of the segments at the anterior end of certain polychætous annelids, especially those belonging to the family Amphinomidæ.