Source : Webster's Revised Unabridged Dictionary (1913)

Crotch \Crotch\ (kr?ch; 224), n.; pl. {Crotches} (-?z). [Cf.
   {Crotchet}, {Crutch}.]
   1. The angle formed by the parting of two legs or branches; a
      fork; the point where a trunk divides; as, the crotch of a
      tree.

   2. (Naut.) A stanchion or post of wood or iron, with two arms
      for supporting a boom, spare yards, etc.; -- called also
      {crane} and {crutch}. --Totten.