ptosis

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pto·sis

 (tō′sĭs)
n. pl. pto·ses (-sēz)
Abnormal lowering or drooping of an organ or a part, especially a drooping of the upper eyelid caused by muscle weakness or paralysis.

[Greek ptōsis, fall, from piptein, ptō-, to fall; see pet- in Indo-European roots.]

pto′tic (-tĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ptosis

(ˈtəʊsɪs)
n, pl ptoses (ˈtəʊsiːz)
(Pathology) prolapse or drooping of a part, esp the eyelid
[C18: from Greek: a falling]
ptotic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

pto•sis

(ˈtoʊ sɪs)

n., pl. -ses (-siz)
prolapse or drooping of an organ or part, esp. a drooping of the upper eyelid.
[1735–45; < New Latin < Greek ptṓsis a falling]
pto•tic (ˈtoʊ tɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ptosis - drooping of the upper eyelid caused by muscle paralysis and weakness
brow ptosis - sagging eyebrows
descensus, prolapse, prolapsus - the slipping or falling out of place of an organ (as the uterus)
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations

pto·sis

n. Gr. ptosis, prolapso de un órgano o parte, esp. visto en el párpado superior.
English-Spanish Medical Dictionary © Farlex 2012

ptosis

n ptosis f
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.