agnathia
noun
ag·na·thia
| \ ag-ˈnā-thē-ə
, (ˈ)ā-ˈnā-
, -ˈnath-ē-\
, (ˈ)ā-ˈnā-
, -ˈnath-ē-\
Medical Definition of agnathia
: the congenital complete or partial absence of one or both jaws