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  • Webster's Revised Unabridged Dictionary
    • a Diphyodont (Anat) Having two successive sets of teeth (deciduous and permanent), one succeeding the other; as, a diphyodont mammal; diphyodont dentition; -- opposed to monophyodont.
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Century Dictionary and Cyclopedia
    • diphyodont Having two sets of teeth, as a mammal; growing in two sets, as teeth: applied both to the system of dentition and to the animals which have such a system: opposed to monophyodont and polyphyodont. See II.
    • n diphyodont A mammal which has two sets of teeth. Most mammals have a definite set of milk-teeth which are deciduous, and are displaced and replaced by a permanent set. The latter, as a rule, differ both numerically and otherwise from the former, particularly in the appearance of true molars, which are lacking in the milk-dentition. Thus, in a child there are 20 teeth, none of them molars proper; in the adult there are 32, an increase of three molars above and below on each side.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Diphyodont dif′i-ō-dont having two sets of teeth
    • n Diphyodont a mammal possessing such
    • ***


Webster's Revised Unabridged Dictionary
Gr. double (di- = di`s- twice + to produce) + 'odoy`s 'odo`ntos, tooth


In literature:

The "grinders" in man, or the teeth in diphyodont Mammals which are not preceded by milk-teeth.
"The Ancient Life History of the Earth" by Henry Alleyne Nicholson
We have thus the diphyodont arrangement.
"The Cambridge Natural History, Vol X., Mammalia" by Frank Evers Beddard