[1] : The Collaborative International Dictionary of English v.0.48

paillasse \paillasse"\ ?; f. ?, n. f., fr. paille straw. see
   pallet a bed.
   an under bed or mattress of straw. written also
   palliasse.
   1913 webster
see also:
pallet palliasse 

[2] : The Collaborative International Dictionary of English v.0.48

palliasse \palliasse"\, n.
   see paillasse.
   1913 webster
see also:
paillasse 

[3] : WordNet (r) 2.0

palliasse
     n : mattress consisting of a thin pad filled with straw or
         sawdust syn: paillasse
see also:
paillasse 

Palliasse >> P Words
Palliasse, definition of term: Palliasse
palliasse_pag1.html