| Noun | 1. | genus Poncirus - one species: trifoliate orange rosid dicot genus - a genus of dicotyledonous plants family Rutaceae, rue family, Rutaceae - a family of dicotyledonous plants of order Geraniales; have flowers that are divide into four or five parts and usually have a strong scent Poncirus trifoliata, trifoliata, trifoliate orange, wild orange - small fast-growing spiny deciduous Chinese orange tree bearing sweetly scented flowers and decorative but inedible fruit: used as a stock in grafting and for hedges |