- a dense, white, fibrous membrane that, with the cornea, forms the external covering of the eyeball.
Origin of sclera
1885–90; < New Latin < Greek sklērá (feminine) hard
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for sclera
In acute glaucoma the sclera appears to be edematous and slightly thickened.
As the disease progresses the sclera becomes denser than normal.
This permits the sclera to show through a very little at this part.
The eyes may remain open for such long periods of time that the conjunctiva and sclera may become quite dry and ulcerate.Benign Stupors
In the stage of degeneration, ectasae of the sclera occur most frequently near the equator of the globe.
- the firm white fibrous membrane that forms the outer covering of the eyeballAlso called: sclerotic
C19: from New Latin, from Greek sklēros hard
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
Word Origin and History for sclera
1886, medical Latin, from Greek sklera (menix) "the hard (membrane)," fem. of skleros "hard" (see sclerosis).
Online Etymology Dictionary, © 2010 Douglas Harper
- The tough fibrous tunic forming the outer envelope of the eye and covering all of the eyeball except the cornea; the white of the eye.sclerotic
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- The tough, white, fibrous tissue that covers all of the eyeball except the cornea.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.