‖Or‐ni′tho‐scel″i‐da (?), n. pl. [NL., fr. Gr. ὄρνισ, ὄρνιθοσ, a bird + � a leg.] (Zoöl.) A group of extinct Reptilia, intermediate in structure (especially with regard to the pelvis) between reptiles and birds. — Or′ni‐tho‐scel″i‐dan (#), a.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.