Also found in: Thesaurus.
Related to genus Rosa: rose
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|Noun||1.||genus Rosa - large genus of erect or climbing prickly shrubs including roses|
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