prognathous

形容词 prognathous:

1. having a projecting lower jaw
   同义词：prognathic, hypognathous

prog.na.thous

adj.（形容词）
Having jaws that project forward to a marked degree.
下巴突出的：下巴向前突出到明显的程度的

【引伸】
prog.nathism