Diphyodont :: Diphyodont (a.) Having two successive sets of teeth (deciduous and permanent), one succeeding the other; as, a diphyodont mammal; diphyodont dentition; -- opposed to monophyodont..
Diphyodont :: Diphyodont (n.) An animal having two successive sets of teeth.
Ichthyodorulite :: Ichthyodorulite (n.) One of the spiny plates foundon the back and tail of certain skates.
Monophyodont :: Monophyodont (a.) Having but one set of teeth; -- opposed to diphyodont.
Tethyodea :: Tethyodea (n. pl.) A division of Tunicata including the common attached ascidians, both simple and compound. Called also Tethioidea..