Periwinkle is...

Flora and fauna

• Periwinkle (mollusc)
• A regional term for the gravel-encased larva of the Caddisfly
• Periwinkle (plant), two related genera:
  • Catharanthus (Madagascar periwinkles)
  • Vinca (European periwinkles)
• Periwinkle (color), a pale shade of indigo, from the flower colour of Vinca

Other

• A character from the television show Blue's Clues

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