First Known Use: 1743
Dictionary
ptosis
noun pto·sis \ˈtō-səs\
plural pto·ses \-ˌsēz\
Definition of PTOSIS
: a sagging or prolapse of an organ or part; especially : a drooping of the upper eyelid
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Origin of PTOSIS
New Latin, from Greek ptōsis act of falling, from piptein
Medical Dictionary
ptosis
noun pto·sis \ˈtō-səs\
plural pto·ses \-ˌsēz\
Medical Definition of PTOSIS
: a sagging or prolapse of an organ or part <renal ptosis>; especially : a drooping of the upper eyelid (as from paralysis of the oculomotor nerve)
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