Periwinkle

n.	1.	(Zool.) Any small marine gastropod shell of the genus Littorina. The common European species (Littorina littorea), in Europe extensively used as food, has recently become naturalized abundantly on the American coast. See Littorina.
	1.	(Bot.) A trailing herb of the genus Vinca.

Noun	1.	periwinkle - chiefly trailing poisonous plants with blue flowers
	2.	periwinkle - commonly cultivated Old World woody herb having large pinkish to red flowers Synonyms: Cape periwinkle, Catharanthus roseus, cayenne jasmine, Madagascar periwinkle, red periwinkle, rose periwinkle, Vinca rosea, old maid
	3.	periwinkle - small edible marine snail; steamed in wine or baked Synonyms: winkle
	4.	periwinkle - edible marine gastropod Synonyms: winkle

genus Vinca, large periwinkle, myrtle, subshrub, suffrutex, Vinca, Vinca major, Vinca minor