6. To give vent; to utter; to make public.

Macaulay took occasion to ventilate one of those starling, but not very

profound, paradoxes.

J. C. Shairp.

Ven`ti*la"tion (?), n. [L. ventilatio: cf. F. ventilation.] 1. The act

of ventilating, or the state of being ventilated; the art or process of

replacing foul air by that which is pure, in any inclosed place, as a

house, a church, a mine, etc.; free exposure to air.

Insuring, for the laboring man, better ventilation.

F. W. Robertson.

2. The act of refrigerating, or cooling; refrigeration; as, ventilation

of the blood. [Obs.] Harvey.

3. The act of fanning, or winnowing, for the purpose of separating

chaff and dust from the grain.

4. The act of sifting, and bringing out to view or examination; free

discussion; public exposure.

The ventilation of these points diffused them to the knowledge of the

world.

Bp. Hall.

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 (Dict.).

||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 Vend&?;miaire.

||

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.

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.

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