| Noun | 1. | genus Arabidopsis - a genus of the mustard family having white or yellow or purplish flowers; closely related to genus Arabis dilleniid dicot genus - genus of more or less advanced dicotyledonous trees and shrubs and herbs Brassicaceae, Cruciferae, family Brassicaceae, family Cruciferae, mustard family - a large family of plants with four-petaled flowers; includes mustards, cabbages, broccoli, turnips, cresses, and their many relatives |