ptosis

American

[toh-sis] / ˈtoʊ sɪs /

noun

Pathology.

a drooping of the upper eyelid.
prolapse or drooping of any organ.

ptosis British

/ ˈtəʊsɪs, ˈtɒtɪk /

noun

prolapse or drooping of a part, esp the eyelid

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

ptotic

adjective

Etymology

Origin of ptosis

1735–45; < New Latin < Greek ptṓsis a falling

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023