Countersunk

Definition:

  • (imp. & p. p.) of Countersink
  • (p. p. & a.) Chamfered at the top; -- said of a hole.
  • (p. p. & a.) Sunk into a chamfer; as, a countersunk bolt.
  • (p. p. & a.) Beveled on the lower side, so as to fit a chamfered countersink; as, a countersunk nailhead.