Noun | 1. | ![]() 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 pear tree, Pyrus communis, pear - Old World tree having sweet gritty-textured juicy fruit; widely cultivated in many varieties |