Periwinkle

Periwinkle is...

• Periwinkle, a mollusc\n* Periwinkle, a genus of garden plants, Vinca, in the family Apocynaceae.\n* a light, dull shade of blue, from the flower colour of Vinca.

The name derives from Latin per vinca, "to wind around", referring to the spiral structure of the mollusc's shell, and to the use of the plant in wreaths.