holocephalan

from the GNU version of the Collaborative International Dictionary of English.

• noun A member of the Holocephali, fish with high compressed heads and a bodies tapering off into a long tail. See also hoocephali.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun zoology Any cartilaginous fish of the subclass Holocephali; the chimeras

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun fish with high compressed head and a body tapering off into a long tail