Congenital absence of the lower jaw, usually accompanied by approximation of the ears. ... See: otocephaly, synotia. ... Origin: G. A-priv. + gnathos, jaw ... (05 Mar 2000) ... 
(ag-na´the-ә) congenital absence of the lower jaw.
Type: Term Pronunciation: āg-nā′thē-ă Definitions: 1. Congenital absence of the mandible, usually accompanied by approximation of the ears.
agnathia A total absence of the lower jaw.