Ventral fins(Zoöl.), the posterior pair of fins of a fish. They are often situated beneath the belly, but sometimes beneath the throat.Ventral segment. (Acoustics) See Loop, n., 5.

(Ven"tri*cle) n. [L. ventriculus the stomach, a ventricle, dim. of venter the belly: cf. F. ventricule. See Ventral.]

1. (Anat.) A cavity, or one of the cavities, of an organ, as of the larynx or the brain; specifically, the posterior chamber, or one of the two posterior chambers, of the heart, which receives the blood from the auricle and forces it out from the heart. See Heart.

The principal ventricles of the brain are the fourth in the medulla, the third in the midbrain, the first and second, or lateral, ventricles in the cerebral hemispheres, all of which are connected with each other, and the fifth, or pseudocœle, situated between the hemispheres, in front of, or above, the fornix, and entirely disconnected with the other cavities. See Brain, and Cœlia.

2. The stomach. [Obs.]

Whether I will or not, while I live, my heart beats, and my ventricle digests what is in it.
Sir M. Hale.

3. Fig.: Any cavity, or hollow place, in which any function may be conceived of as operating.

These [ideas] are begot on the ventricle of memory.

5. The act of giving vent or expression. "Ventilation of his thoughts." Sir H. Wotton.

(Ven"ti*la*tive) a. Of or pertaining to ventilation; adapted to secure ventilation; ventilating; as, ventilative apparatus.

(Ven"ti*la`tor) n. [Cf. F. ventilateur, L. ventilator a winnower.] A contrivance for effecting ventilation; especially, a contrivance or machine for drawing off or expelling foul or stagnant air from any place or apartment, or for introducing that which is fresh and pure.

(Ven*tose") n. A ventouse. [Obs.] Holland.

(Ven*tose"), a. [L. ventosus windy. See Ventilate.] Windy; flatulent. Richardson

(||Ven`tose") n. [F. ventôse. See Ventose, a.] The sixth month of the calendar adopted by the first French republic. It began February 19, and ended March 20. See Vendmiaire.

(Ven*tos"i*ty) n. [L. ventositas: cf. F. ventosité. See Ventose, n.] Quality or state of being ventose; windiness; hence, vainglory; pride. Bacon.

(Ven"touse) n. [F.] A cupping glass. [Obs.] Chaucer.

(Ven"touse), v. t. & i. To cup; to use a cupping glass. [Obs.] [Written also ventuse.] Chaucer.

(Ven"trad) adv. [L. venter belly + ad to.] (Anat.) Toward the ventral side; on the ventral side; ventrally; — opposed to dorsad.

(Ven"tral) a. [L. ventralis, fr. venter the belly; perhaps akin to G. wanst: cf. F. ventral.]

1. (Anat.) 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 dorsal.

2. (Bot.) (a) Of or pertaining to that surface of a carpel, petal, etc., which faces toward the center of a flower. (b) Of or pertaining to the lower side or surface of a creeping moss or other low flowerless plant. Opposed to dorsal.

  By PanEris using Melati.

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