[ dʌɪ'sɪnədɒnt ]
■ noun a fossil herbivorous mammal-like reptile of the late Permian and Triassic periods, with beaked jaws and no teeth apart from two tusks in the upper jaw of the male.
Origin
C19: from mod. L. Dicynodontia , from Gk di- 'two' + kuōn 'dog' + odous , odont- 'tooth'.