Wiktionary
n. (context medicine English) a swollen and rounded face, often indicative of a disease (Cushing's syndrome) or of a steroid side-effect.
Wikipedia
"Moon-Face" is a short story by Jack London, first published in 1902. It explores the subject of extreme antipathy.
Usage examples of "moon-face".
Aside from these there were a moon-faced Bengali babu, a dark Italian with flashing eyes and teeth, and a stout person of bovine Teutonic cast--the type that is sage, shrewd, easy-going when unopposed, but capable under provocation of exhibiting the most conscienceless brutality.
Andrea flat in the snow now and with the icy rims of the binoculars clamped hard against his eyes, had no difficulty at all in making an immediate identification: Sergeant Baer, moon-faced, rotund and about seventy and overweight for his unimpressive height, had unmistakable physical presence which only the mentally incapacitated could easily forget.
The one at the end was roundly built and on the heavyish side, with thinning hair combed straight back from the forehead in typical Russian style, and a fleshy moon-face amply provided with chins, McCain's first thought was that he'd have looked more in place in crumpled clothes at the front of a schoolroom, or fussing with rosebushes outside a house in the suburbs.
Longarm waited until they were inside, where the moon-faced Comanche sergeant seemed to keep his own moonshine on file, before he got out the brass button his Kiowa pals had found on the mountain for him.
The moon-faced boy was eating a bank chung, a traditional Vietnamese sweet cake made from sticky rice.
All he could ever see was Aarfy, with whose fustian, moon-faced ineptitude he had finally lost all patience, and there were minutes of agonizing fury and frustration in the sky when he hungered to be demoted again to a wing plane with a loaded machine gun in the compartment instead of the precision bombsight that he really had no need for, a powerful, heavy fifty-caliber machine gun he could seize vengefully in both hands and turn loose savagely against all the demons tyrannizing him: at the smoky black puffs of the flak itself.
When he knocked at the fourth door, a weak voice asked him in and, through the birdcages cluttering the room, he saw, near the window, in a Voltaire chair, a moon-faced old woman.