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

(inorganic chemistry) The normal form of ion exchange in which cations such as those of calcium are removed from solution

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

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

The Columbian Exchange.

(history) The widespread transfer of animals, plants, culture, human populations, communicable diseases, technology and ideas between the American and Afro-Eurasian hemispheres in the 15th and 16th centuries, related to European colonization and trade after Christopher Columbus' 1492 voyage.

exchange rate

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

plural of part exchange

present participle of part exchange