The Collaborative International Dictionary of English v.0.48:

Moloch \Mo"loch\, prop. n. [Heb. molek king.]
   1. (Script.) The fire god of the Ammonites in Canaan, to whom
      human sacrifices were offered; Molech. Also applied
      figuratively.
      [1913 Webster]

   2. (Zool.) A spiny Australian lizard (Moloch horridus). The
      horns on the head and numerous spines on the body give it
      a most formidable appearance.
      [1913 Webster] Molokane

WordNet (r) 3.0 (2006):

Moloch horridus
    n 1: desert lizard that feeds on ants [syn: mountain devil,
         spiny lizard, Moloch horridus]