The Collaborative International Dictionary of English v.0.48:

Chimaera \Chi*m[ae]"ra\, n. [NL. See Chimera.] (Zool.)
   A cartilaginous fish of several species, belonging to the
   order Chimaeriformes of the class Holocephali. The teeth
   are few and large. The head is furnished with appendages, and
   the tail terminates in a point.
   [1913 Webster]

   Note: Note: more information and an image is available at: [a

         href="http:]/www.fishbase.org/Summary/SpeciesSummary.cfm?genusname=Chimaera&speciesname=monstrosa">Fishbase
         - chimaera.
         [PJC]

WordNet (r) 3.0 (2006):

Chimaera
    n 1: (Greek mythology) fire-breathing female monster with a
         lion's head and a goat's body and a serpent's tail;
         daughter of Typhon [syn: Chimera, Chimaera]
    2: a grotesque product of the imagination [syn: chimera,
       chimaera]
    3: a deep-sea fish with a tapering body, smooth skin, and long
       threadlike tail