Cimex

from WordNet (r) 3.0 (2006)

Cimex
    n 1: type genus of the Cimicidae: bedbugs [syn: {Cimex}, {genus
         Cimex}]

from The Collaborative International Dictionary of English v.0.48

Cimex \Ci"mex\, n.; pl. {Cimices}. [L., a bug.] (Zool.)
   A genus of hemipterous insects of which the bedbug is the
   best known example. See {Bedbug}.
   [1913 Webster]