ptosis


pto·sis

noun \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

Origin of PTOSIS

New Latin, from Greek ptōsis act of falling, from piptein
First Known Use: 1743

pto·sis

noun \ˈtō-səs\   (Medical Dictionary)
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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