| Noun | 1. | genus Oxalis - type genus of the Oxalidaceae; large genus of plants having leaves that resemble clover and variously colored flowers usually clustered in umbels rosid dicot genus - a genus of dicotyledonous plants family Oxalidaceae, Oxalidaceae, wood-sorrel family - a family of widely distributed herbs of the order Geraniales; have compound leaves and pentamerous flowers |