Cecropia n 1: large genus of tropical American trees that yield a bast fiber used for cordage and bark used in tanning; milky juice yields caoutchouc [syn: {Cecropia}, {genus Cecropia}] 2: North American silkworm moth; larvae feed on the leaves of forest trees [syn: {cecropia}, {cecropia moth}, {Hyalophora cecropia}]