prognathousPronunciation: /prɒgˈneɪθəs, ˈprɒgnəθəs/Definition of prognathous adjective having a projecting lower jaw or chin. (of a lower jaw or chin) projecting: her chin was a little prognathousDerivatives prognathicPronunciation: /prɒgˈnaθɪk/ adjective prognathism noun Origin: mid 19th century: from pro-2 'before' + Greek gnathos 'jaw' + -ousprognathous in other Oxford dictionaries Definition of prognathous in the US English dictionary
