‖n. [ NL., fr. Gr. &unr_; toothless; 'an priv. + &unr_;, &unr_;, a tooth. ] (Zool.) A genus of fresh-water bivalves, having no teeth at the hinge. [ Written also Anodonta. ] [ 1913 Webster ]
n. [ Iguana + Gr. &unr_;, &unr_;, a tooth. ] (Paleon.) A genus of gigantic herbivorous dinosaurs having a birdlike pelvis and large hind legs with three-toed feet capable of supporting the entire body. Its teeth resemble those of the iguana, whence its name. Several species are known, mostly from the Wealden of England and Europe. See Illustration in Appendix. [ 1913 Webster ]
n. [ Gr. &unr_; wing + &unr_; priv. + &unr_;, &unr_;, a tooth. ] (Paleon.) A genus of American Cretaceous pterodactyls destitute of teeth. Several species are known, some of which had an expanse of wings of twenty feet or more. [ 1913 Webster ]
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