Circumvallate /(?)/

Cir·cum·val·late

Circumvallate

v. t.
  1. To surround with a rampart or wall.

Circumvallate

a.
  1. Surrounded with a wall; inclosed with a rampart.
  2. Surrounded by a ridge or elevation; as, the circumvallate papillæ, near the base of the tongue. (Anat.)