| Noun | 1. | Vinca - periwinkles: low creeping evergreen perennialsdicot genus, magnoliopsid genus - genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination Apocynaceae, dogbane family, family Apocynaceae - chiefly tropical trees or shrubs or herbs having milky juice and often showy flowers; many are sources of drugs periwinkle - chiefly trailing poisonous plants with blue flowers |