The Collaborative International Dictionary of English v.0.48:

Emphysematous \Em`phy*sem"a*tous\, a. [Cf. F. emphys['e]mateux.]
   (Med.)
   Pertaining to, or of the nature of, emphysema; swelled;
   bloated.
   [1913 Webster]

WordNet (r) 3.0 (2006):

emphysematous
    adj 1: relating to or resembling or being emphysema