<ornithology> An extinct order of birds. It includes only the Archaeopteryx. ... Origin: NL, from Gr. A bird + an ancestor. ... (04 Mar 1998) ... Found on http://www.encyclo.co.uk/local/20973
Or·ni`tho·pap'pi noun plural [ New Latin , from Greek ... a bird + ... an ancestor.] (Zoology) An extinct order of birds. It includes only the Archæopteryx. Found on http://www.encyclo.co.uk/webster/O/33