The Collaborative International Dictionary of English v.0.48:

Cerement \Cere"ment\, n. [L. cera wax: cf. F. cirement.]
   (a) A cerecloth used for the special purpose of enveloping a
       dead body when embalmed.
   (b) Any shroud or wrapping for the dead.
       [1913 Webster]

WordNet (r) 3.0 (2006):

cerement
    n 1: burial garment in which a corpse is wrapped [syn: pall,
         shroud, cerement, winding-sheet, winding-clothes]