choisyaPronunciation: /ˈtʃɔɪzɪə/Definition of choisya noun an evergreen Mexican shrub with sweet-scented white flowers, grown as an ornamental. Choisya ternata, family Rutaceae Origin:named after Jacques D. Choisy (1799–1859), Swiss botanistchoisya in other Oxford dictionaries Definition of choisya in the US English dictionary