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Of, pertaining to, or situated near, the belly, or ventral side, of an animal or of one of its parts; hemal; abdominal; as, the ventral fin of a fish; the ventral root of a spinal nerve; -- opposed to Ant: dorsal.

(Anat.) Having two bellies or protuberances; as, a biventral, or digastric, muscle, or the biventral lobe of the cerebellum.

inct upper and lower surfaces, as most common leaves. The leaves of the iris are not dorsiventral.

From the dorsal to the ventral side of an animal; as, the dorsoventral axis.

Of or pertaining to the abdomen; ventral; as, the abdominal regions, muscles, cavity.

group including the greater part of fresh-water fishes, and many marine ones, having the ventral fins under the abdomen behind the pectorals.

An order of fishes having some of the rays of the dorsal, ventral, and anal fins unarticulated and spinelike, as the perch.

A kind of annelid larva having both a dorsal and a ventral circle of special cilia.

Destitute of the ventral fin, as the eels.

An order of fishes without ventral fins, including the eels.

A group of Annelida remarkable for having no external segments or distinct ventral nerve ganglions.

cate the base or position at or near a base; forming a base; as, basibranchials, the most ventral of the cartilages or bones of the branchial arches; basicranial, situated at the base of the cranium; basifacial, basitemporal, etc.

have numerous segments, each bearing two pairs of small, slender legs, which are attached ventrallly, near together.

One of a pair of male copulatory organs, developed on the anterior side of the ventral fins of sharks and other elasmobranchs. See Illust. of Chimæra.

Hollow-seeded; having the ventral face of the seedlike carpels incurved at the ends, as in coriander seed.

g to, or in relation with, both dermal and hæmal structures; as, the dermohæmal spines or ventral fin rays of fishes.

Having two bellies; biventral; -- applied to muscles which are fleshy at each end and have a tendon in the middle, and esp. to the muscle which pulls down the lower jaw.

gal; neural; as, the dorsal fin of a fish; the dorsal artery of the tongue; -- opposed to ventral.

A ventral cartilaginous or bony element of the coracoid in the shoulder girdle of some vertebrates.

ns of fishes. -- Fin whale (Zoöl.), a finback. -- Paired fins (Zoöl.), the pectoral and ventral fins, corresponding to the fore and hind legs of the higher animals. -- Unpaired, or Median, fins (Zoöl.), the dorsal, caudal, and anal fins.