Source : Webster's Revised Unabridged Dictionary (1913)

Petrogale \Pe*trog"a*le\, n. [NL., fr. Gr. ? a rock + ? a
   weasel.] (Zo["o]l.)
   Any Australian kangaroo of the genus {Petrogale}, as the rock
   wallaby ({P. penicillata}).

Source : WordNet®

Petrogale
     n : rock wallabies [syn: {genus Petrogale}]