(physics) Any device (such as a radiator) that transfers heat from one fluid to another via a separating wall.

plural of stock exchange

A medium of exchange.

An intermediary used in trade to avoid the inconveniences of a pure barter system, such as money.

(banking) A document demanding payment from another party, especially used in international trade.

(Internet) A scheme of reciprocal linking whereby two or more websites link to one another to increase traffic.

plural of key exchange

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

plural of heat exchanger

plural of foreign exchange