ptosis

[ toh-sis ]

/ ˈtoʊ sɪs /

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noun Pathology.

a drooping of the upper eyelid.

prolapse or drooping of any organ.

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Origin of ptosis

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

OTHER WORDS FROM ptosis

pto·tic

[toh-tik], /ˈtoʊ tɪk/, adjective

Words nearby ptosis

Ptolemy, Ptolemy I, Ptolemy II, ptomaine, ptomaine poisoning, ptosis, ptp., pts., PTSD, PTT, ptui

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use ptosis in a sentence

This was diagnosed as ptosis of his organs, and an operation was done to tuck these up.
Psychotherapy|James J. Walsh
When the ptosis got very bad he would hold his eyelid up with one hand while he wrote.
The Man from Archangel|A. Conan Doyle
This operation is performed for cases of ptosis in which there is partial or complete loss of upward movement of the lid.
A System of Operative Surgery, Volume IV (of 4)|Various
They are often preceded by strabismus, with or without ptosis; the strabismus, is usually accompanied by amblyopia.
Neuralgia and the Diseases that Resemble it|Francis E. Anstie

The levator palpebrae superioris is paralysed, and the resulting ptosis completes the picture.
Poisons: Their Effects and Detection|Alexander Wynter Blyth

British Dictionary definitions for ptosis

ptosis

/ (ˈtəʊsɪs) /

noun plural ptoses (ˈtəʊsiːz)

prolapse or drooping of a part, esp the eyelid

Derived forms of ptosis

ptotic (ˈtɒtɪk), adjective

Word Origin for ptosis

C18: from Greek: a falling

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