‖Or‐thop″o‐da (?), n. pl. [NL. See Ortho-, and -poda.] (Zoöl.) An extinct order of reptiles which stood erect on the hind legs, and resembled birds in the structure of the feet, pelvis, and other parts.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.