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The Collaborative International Dictionary
Rhizodont

Rhizodont \Rhiz"o*dont\, n. [Gr. ??? root + ???, ???, a tooth.] (Zo["o]l.) A reptile whose teeth are rooted in sockets, as the crocodile.

Wiktionary
rhizodont

n. (context zoology English) A reptile whose tooth are rooted in sockets, such as the crocodile.