The Collaborative International Dictionary of English v.0.48:

Embalmment \Em*balm"ment\, n. [Cf. F. embaumement.]
   The act of embalming. [R.] --Malone.
   [1913 Webster]

WordNet (r) 3.0 (2006):

embalmment
    n 1: preservation (of a dead body) by treating with balsams and
         drugs and other chemicals