(1):

(n.) One who, or that which, condenses.

(2):

(n.) An instrument for condensing air or other elastic fluids, consisting of a cylinder having a movable piston to force the air into a receiver, and a valve to prevent its escape.

(3):

(n.) An instrument for concentrating electricity by the effect of induction between conducting plates separated by a nonconducting plate.

(4):

(n.) A lens or mirror, usually of short focal distance, used to concentrate light upon an object.

(5):

(n.) An apparatus for receiving and condensing the volatile products of distillation to a liquid or solid form, by cooling.

(6):

(n.) An apparatus, separate from the cylinder, in which the exhaust steam is condensed by the action of cold water or air. See Illust. of Steam engine.