n. [ LL. cambium exchange, fr. L. cambire to exchange. It was supposed that cambium was sap changing into wood. ]
‖n. [ NL. See Peri-, and Cambium. ] (Biol.) A layer of thin-walled young cells in a growing stem, in which layer certain new vessels originate. [ 1913 Webster ]
‖n. [ NL. See Pro-, and Cambium. ] (Bot.) The young tissue of a fibrovascular bundle before its component cells have begun to be differentiated. Sachs. [ 1913 Webster ]