moon-face
/ˈmuːnfeɪs/noun
1A moon-shaped face; a round full face. Also poetic : a face likened to the moon in beauty.
2 Medicine. The rounded face characteristic of persons with chronically elevated glucocorticoid levels, whether endogenously produced (as in Cushing's disease) or as the result of high-dose therapy.
Origin
Early 19th century; earliest use found in Thomas Carlyle (1795–1881), author, biographer, and historian. From moon + face. Compare earlier moon-faced.