Merriam-Webster Collegiate Dictionary - ginkgo

 also gingko  noun  (plural ~es or ~s; also gingkos or gingkoes)  Etymology: New Latin Ginkgo, from Japanese ginkyo  Date: 1773 a gymnospermous dioecious tree (Ginkgo biloba) of eastern China that is widely grown as an ornamental or shade tree and has fan-shaped leaves and foul-smelling yellowish fleshy seed coats — called also maidenhair tree  2. ~ biloba