| Rosa | low-growing bristly shrub of southern Oregon and California with creeping rootstocks and usually corymbose flowers |
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| Rosa | a skin disease of adults (more often women) in which blood vessels of the face enlarge resulting in a flushed appearance |
| Rosa | a large family of dicotyledonous plants of order Rosales |
| Rosa | having a dusty purplish pink color |
| Rosa | of or pertaining to or characteristic of plants of the family Rosaceae |
| Rosa | in some classifications this category does not include Leguminosae |
| Rosa | beads used in counting prayers (especially Catholic rosary) |