Source : Webster's Revised Unabridged Dictionary (1913)

Killock \Kil"lock\, n. [Cf. Scot. killick ``the flue [fluke] of
   an anchor.'' --Jamieson.]
   A small anchor; also, a kind of anchor formed by a stone
   inclosed by pieces of wood fastened together. [Written also
   {killick}.]