| Noun | 1. | Pinckneya - small genus of shrubs or small trees of southeastern United States and northern South Americaasterid dicot genus - genus of more or less advanced dicotyledonous herbs and some trees and shrubs family Rubiaceae, madder family, Rubiaceae - widely distributed family of mostly tropical trees and shrubs and herbs; includes coffee and chinchona and gardenia and madder and bedstraws and partridgeberry | |