VAN'T HOFF'S LAW
Van't Hoff's law. [After J.H. van't Hoff, Dutch physical chemist.]
(Phys. Chem.)

Defn: The generalization that: when a system is in equilibrium, of the two opposed interactions the endothermic is promoted by raising the temperature, the exothermic by lowering it.

VANWARD
Van"ward, a.

Defn: Being on, or towards, the van, or front. "The vanward frontier." De Quincey.

VAP
Vap, n. Etym: [See Vapid.]

Defn: That which is vapid, insipid, or lifeless; especially, the lifeless part of liquor or wine. [Obs.] In vain it is to wash a goblet, if you mean to put it nothing but the dead lees and vap of wine. Jer. Taylor.

VAPID Vap"id, a. Etym: [L. vapidus having lost its lire and spirit, vapid; akin to vappa vapid wine, vapor vapor. See Vapor.]

Defn: Having lost its life and spirit; dead; spiritless; insipid; flat; dull; unanimated; as, vapid beer; a vapid speech; a vapid state of the blood. A cheap, bloodless reformation, a guiltless liberty, appear flat and vapid to their taste. Burke. — Vap"id*ly, adv. — Vap"id*ness, n.

VAPIDITY
Va*pid"i*ty, n.

Defn: The quality or state of being vapid; vapidness.