underhung

adjective3

1. •
   Having the lower jaw projecting.

   • [H]e was marked with small-pox, had large features, high cheek-bones, deeply set eyes, and a very long chin; and had got the trick which many underhung men have of compressing the upper lip. — 1859
2. •
   Hung or suspended from above.

   • Slidebars of the three-bar type are provided in conjunction with an underhung crosshead. — 1954
3. •
   Of a sliding door: resting on a track at the bottom, instead of being suspended.

   • Usually, [railroad] car doors slide on the top door-track, being then termed overhung doors; the underhung door being one supported and sliding on a rail below the door. — 1919