The Collaborative International Dictionary of English v.0.48:

Civet \Civ"et\ (s[i^]v"[e^]t), n. [F. civette (cf. It. zibetto)
   civet, civet cat, fr. LGr. zape`tion, fr. Ar. zub[=a]d,
   zab[=a]d, civet.]
   1. A substance, of the consistence of butter or honey, taken
      from glands in the anal pouch of the civet (Viverra
      civetta). It is of clear yellowish or brownish color, of
      a strong, musky odor, offensive when undiluted, but
      agreeable when a small portion is mixed with another
      substance. It is used as a perfume.
      [1913 Webster]

   2. (Zool) The animal that produces civet (Viverra civetta);
      -- called also civet cat. It is carnivorous, from two to
      three feet long, and of a brownish gray color, with
      transverse black bands and spots on the body and tail. It
      is a native of northern Africa and of Asia. The name is
      also applied to other species.
      [1913 Webster]

WordNet (r) 3.0 (2006):

civet cat
    n 1: raccoon-like omnivorous mammal of Mexico and the
         southwestern United States having a long bushy tail with
         black and white rings [syn: bassarisk, cacomistle,
         cacomixle, coon cat, raccoon fox, ringtail, ring-
         tailed cat, civet cat, miner's cat, Bassariscus
         astutus]
    2: cat-like mammal typically secreting musk used in perfumes
       [syn: civet, civet cat]