the world > life > biology > physical aspects or shapes > specific areas or structures > [verb (transitive)] > margin or periphery (2)
transitive. To provide with an edge or border; to serve as a margin to; (occasionally) to abut… Zoology, Botany, and Pathology.
transitive. Chiefly Botany, Zoology, and Medicine. To provide with a margin or border; to form a distinct border or outline to.