Source : Webster's Revised Unabridged Dictionary (1913)

Throstle \Thros"tle\, n. [OE. throsel, AS. [thorn]rostle,
   [thorn]rosle; akin to MHG. trostel, G. drossel, Icel.
   [thorn]r["o]str, Sw. trast, Lith. strazdas, L. turdus.
   [root]238. Cf. {Thrush} the bird.]
   1. (Zo["o]l.) The song thrush. See under {Song}.

   2. A machine for spinning wool, cotton, etc., from the rove,
      consisting of a set of drawing rollers with bobbins and
      flyers, and differing from the mule in having the twisting
      apparatus stationary and the processes continuous; -- so
      called because it makes a singing noise.

   {Throstle cock}, the missel thrush. [Prov. Eng.]