The Collaborative International Dictionary of English v.0.48:

Batrachian \Ba*tra"chi*an\, a. (Zool.)
   Pertaining to the Batrachia. -- n. One of the Batrachia.
   [1913 Webster]

WordNet (r) 3.0 (2006):

batrachian
    adj 1: relating to frogs and toads [syn: anuran, batrachian,
           salientian]
    n 1: any of various tailless stout-bodied amphibians with long
         hind limbs for leaping; semiaquatic and terrestrial species
         [syn: frog, toad, toad frog, anuran, batrachian,
         salientian]