PILLOW n.
owcase], a pillowcase; pillow slip. [Obs.] Chaucer. -- Pillow block (Mach.), a block, or standard, for supporting a journal, as of a shaft. It is usually bolted to the frame or foundation of a machine, and is often furnished with journal boxes, and a movable cover, or cap, for tightening the bearings by means of bolts…
PITCH n.
tween the centers of holes, as of rivet holes in boiler plates. Concert pitch (Mus.), the standard of pitch used by orchestras, as in concerts, etc. -- Diametral pitch (Gearing), the distance which bears the same relation to the pitch proper, or circular pitch, that the diameter of a circle bears to its circumference;…
PROOF a.
Being of a certain standard as to strength; -- said of alcoholic liquors. Proof charge (Firearms), a charge of powder and ball, greater than the service charge, fired in an arm, as a gun or cannon, to test its strength. -- Proof impression. See under Impression. -- Proof load (Engin.), the greatest load than can be a…
PROPRIETY n.
The quality or state of being proper; suitableness to an acknowledged or correct standard or rule; consonance with established principles, rules, or customs; fitness; appropriateness; as, propriety of behavior, language, manners, etc. "The rule of propriety," Locke.