The Collaborative International Dictionary of English v.0.48:

Counterpane \Coun"ter*pane`\ (koun"t?r-p?n`), n. [See
   Counterpoint, corrupted into counterpane, from the
   employment of pane-shaped figures in these coverlets. ]
   A coverlet for a bed, -- originally stitched or woven in
   squares or figures.
   [1913 Webster]

         On which a tissue counterpane was cast.  --Drayton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Counterpane \Coun"ter*pane`\, n. [OF. contrepan a pledge,
   security; contre + pan a skirt, also, a pawn or gage, F. pan
   a skirt. See Pane, and cf. Pawn.] (O. Law)
   A duplicate part or copy of an indenture, deed, etc.,
   corresponding with the original; -- now called counterpart.
   [1913 Webster]

         Read, scribe; give me the counterpane.   --B. Jonson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

counterpane
    n 1: decorative cover for a bed [syn: bedspread, bedcover,
         bed cover, bed covering, counterpane, spread]

Moby Thesaurus II by Grady Ward, 1.0:

31 Moby Thesaurus words for "counterpane":
   afghan, bed linen, bedclothes, bedcover, bedding, bedsheet,
   bedspread, blanket, buffalo robe, case, clothes, comfort,
   comforter, contour sheet, cover, coverlet, coverlid, eiderdown,
   fitted sheet, lap robe, linen, patchwork quilt, pillow slip,
   pillowcase, quilt, robe, rug, sheet, sheeting, slip, spread