ornitholestid noun1 •(rare) Any member of the family †Ornitholestidae, now superseded by family †Compsognathidae.E. H. Colbert (pers. commun. to Harshbarger, 1957) suggested that Segisaurus looks very much like an ornitholestid; Ornitholestes is found in the Morrison Formation (Jurassic). — 1975 formsornitholestids
