Source : Webster's Revised Unabridged Dictionary (1913)

Tedder \Ted"der\, n.
   A machine for stirring and spreading hay, to expedite its
   drying.

Tedder \Ted"der\, n. [OE. [root]64. See {Tether}.]
   Same as {Tether}.

Tedder \Ted"der\, v. t. [imp. & p. p. {Teddered}; p. pr. & vb.
   n. {Teddering}.]
   Same as {Tether}.