ornithoscelidan

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• Ornithoscelidan — Ornithoscelida Or*ni tho*scel i*da, n. pl. [NL., fr. Gr. o rnis, o rniqos, a bird + ? a leg.] (Zo[ o]l.) A group of extinct Reptilia, intermediate in structure (especially with regard to the pelvis) between reptiles and birds. {Or ni*tho*scel… …   The Collaborative International Dictionary of English