Definition of "half-face" [half-face]

• Showing only half of the face: as, a half-face picture.
• In military tactics, a turning of the face 45° to the right or left, used in making oblique marches to the right or left. (noun)
• A raised floor or platform. (noun)

The Century Dictionary (Public Domain)

• "Chet looked a little more closely as half-face dug in her pocket."
• "He immediately used it to yank off his half-face scuba mask, before he sucked in deep gasps of fresh clean air."
• "Each tank was filled to the brim with a pale green liquid and encased in them, hovering in the liquid, arms and legs outstretched in humiliating star shapes, were men—naked men wearing half-face scuba breathing masks and plugged into IV and excretion tubes."