The Collaborative International Dictionary of English v.0.48:

Dermacentor \Dermacentor\ n.
   a genus comprising vectors of important diseases of man and
   animals.

   Syn: genus Dermacentor.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Dermacentor
    n 1: vectors of important diseases of man and animals [syn:
         Dermacentor, genus Dermacentor]