Definition of: ventral

(ven′trəl) adjective
1. Biol. a Of, pertaining to, or situated on or near the abdomen or abdominal surface of an animal. b On or toward the lower surface of the body: the ventral plates of a serpent: opposed to dorsal.
2. Bot. Pertaining to the surface of a petal, carpel, etc., that faces the center of a flower.
—noun One of the paired fins on the underside of fishes, homologous with the hind limb of higher vertebrates: in full, ventral fin. [<L ventralis <venter, ventris belly]
—ven′tral·ly adverb