exchange biology definition
3. To give and receive reciprocally, as things of the same kind; to barter; to swap; as, to exchange horses with a neighbor; to exchange houses or hats. Exchange forgiveness with me, noble Hamlet. (Shak) Synonym: to barter, change, commute, interchange, bargain, truck, swap, traffic. Origin: cf.OF. Eschangier, f. Echanger. See exchange. 1. The act of giving or taking one thing in return for another which is regarded as an equivalent; as, an exchange of cattle for grain. 2.