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From The Collaborative International Dictionary of English v.0.48:
Glyptodon \Glyp"to*don\, n. [Gr. ? carved, engraved + ?, ?, tooth. See Glyph.] (Paleon.) An extinct South American quaternary mammal, allied to the armadillos. It was as large as an ox, was covered with tessellated scales, and had fluted teeth. --Owen. [1913 Webster]