an extract of the leaves of ginkgo that is held to enhance mental functioning by increasing blood circulation to the brain
biloba
noun(ginkgo bi-lo-ba)
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