periwinkle

(pĕrˈĭ-wĭngˌkəl)

1. Any of several small, often edible marine snails, especially of the genus Littorina, having thick, cone-shaped, whorled shells.
2. The shell of any of the periwinkles.

(pĕrˈĭ-wĭngˌkəl)

1. Any of several shrubby, trailing, evergreen plants of the genus Vinca, especially V. minor, having glossy, dark green, opposite leaves and flowers with a blue, funnel-shaped corolla. Also called myrtle.
2. Any of several erect herbs of the genus Catharanthus, especially C. roseus, having flowers with a rose-pink or white salverform corolla and a closed throat.
3. A pale purplish blue.