| Noun | 1. | genus Pyracantha - Eurasian evergreen thorny shrubs bearing red or orange-red berries rosid dicot genus - a genus of dicotyledonous plants family Rosaceae, Rosaceae, rose family - a large family of dicotyledonous plants of order Rosales; have alternate leaves and five-petaled flowers with numerous stamens fire thorn, firethorn, pyracanth, Pyracantha - any of various thorny shrubs of the genus Pyracantha bearing small white flowers followed by hard red or orange-red berries |