Source : Webster's Revised Unabridged Dictionary (1913)

Stonechat \Stone"chat`\, n. [Stone + chat.] [So called from the
   similarity of its alarm note to the clicking together of two
   pebbles.] (Zo["o]l.)
   (a) A small, active, and very common European singing bird
       ({Pratincola rubicola}); -- called also {chickstone},
       {stonechacker}, {stonechatter}, {stoneclink},
       {stonesmith}.
   (b) The wheatear.
   (c) The blue titmouse.

   Note: The name is sometimes applied to various species of
         {Saxicola}, {Pratincola}, and allied genera; as, the
         pied stonechat of India ({Saxicola picata}).