Source : Webster's Revised Unabridged Dictionary (1913)

Turk \Turk\, n. [Per. Turk; probably of Tartar origin: cf. F.
   Turc.]
   1. A member of any of numerous Tartar tribes of Central Asia,
      etc.; esp., one of the dominant race in Turkey.

   2. A native or inhabitant of Turkey.

   3. A Mohammedan; esp., one living in Turkey.

            It is no good reason for a man's religion that he
            was born and brought up in it; for then a Turk would
            have as much reason to be a Turk as a Christian to
            be a Christian.                       --Chillingworth.

   4. (Zo["o]l.) The plum weevil. See {Curculio}, and {Plum
      weevil}, under {Plum}.

   {Turk's cap}. (Bot.)
      (a) Turk's-cap lily. See under {Lily}.
      (b) A tulip.
      (c) A plant of the genus {Melocactus}; Turk's head. See
          {Melon cactus}, under {Melon}.

   {Turk's head}.
      (a) (Naut.) A knot of turbanlike form worked on a rope
          with a piece of small line. --R. H. Dana, Jr.
      (b) (Bot.) See {Turk's cap}
      (c) above.

   {Turk's turban} (Bot.), a plant of the genus {Ranunculus};
      crowfoot.

Source : WordNet®

Turk's head
     n : an ornamental knot that resembles a small turban