noun (plural ptoses) Etymology: New Latin, from Greek ptōsis act of falling, from piptein Date: 1743 a sagging or prolapse of an organ or part
PTOSIS
Meaning of PTOSIS in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012