An editor who inspects, and culls from, periodicals, or exchanges, for his or her own publication.

exchange rate

An obsolescent design of telephone exchange that uses Strowger switches as the call routing elements.

(finance) The determination of the exchange rate between currencies when there are one or more intermediate places through which the operations must pass.

plural of heat exchanger

The area in which the baton must be passed from one runner to another during a relay race.

(finance, agriculture) An organization operating under a set of bylaws aimed at promoting trade in one or more commodities by providing services and rules for the conduct of trade.

(chemistry) A reaction in which one or more atoms in a molecule are exchanged for ones of a different isotope of the same element

(Internet) A link exchange scheme where web sites display each other's banners.

A place or service that allows intravenous drug users to obtain new hypodermic needles at little or no cost, often in exchange for used ones.