The Collaborative International Dictionary of English v.0.48:

Rescous \Res"cous\ (r?s"k?s), n. [OE., fr. OF. rescousse, fr.
   rescourre, p. p. rescous, to rescue. See Rescue.]
   1. Rescue; deliverance. [Obs.] --Chaucer.
      [1913 Webster]

   2. (Law) See Rescue, 2. [Obs.]
      [1913 Webster]