subman

From sub- +‎ man.

subman (plural submen)

1. A subhuman; a creature that is less than a man.
   • 1926, Frederick Soddy, Science and Life, page 492:

     We may imagine these submen hunting along the banks of the well-wooded rivers of those long ages of mitigation, camping under a windbreak of boughs at the edge of the wood, occasionally settling down for a spell (as we know from sites whose accumulated debris testifies to long occupation), stalking the deer that came down to drink, grubbing themselves roots in the glades. Still there remain question marks against their physical form.

• busman, mbunas, mubans