A very general feature of the teeth of the Mammalia is what is usually termed the diphyodont dentition.
Having four kinds of teeth, and a set in succession to the milk-teeth, they are Heterodont and diphyodont.
diphyodont, where all the teeth except the molars are of the second set; this characterises nearly all the mammals.
The "grinders" in man, or the teeth in diphyodont Mammals which are not preceded by milk-teeth.
Between the latter condition and the diphyodont state are intermediate stages.
As mentioned on p. 162, the Aard Vark is diphyodont like normal mammals.
The majority of mammals have only two sets of teeth, and are said to be diphyodont; some have only a single series (monophyodont).
The teeth are markedly heterodont and diphyodont, and the molars have broad crowns with tuberculated or ridged surfaces.
The Insectivora are diphyodont and heterodont, having well-developed rooted teeth.
The Primates have a diphyodont and heterodont dentition, generally of an omnivorous type, with cheek teeth adapted for grinding.
diphyodont di·phy·o·dont (dī-fī'ə-dŏnt')
Developing two successive sets of teeth, one deciduous and one permanent, as in humans. n.
A diphyodont animal.