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Douglas Harper's Etymology Dictionary
sclera

1886, medical Latin, from Greek sklera (menix) "the hard (membrane)," fem. of skleros "hard" (see sclerosis).

Wiktionary
sclera

n. (context anatomy English) The white of the eye. It is the tough outer coat of the eye that covers the eyeball except for the cornea.

WordNet
sclera

n. whitish fibrous membrane (albuginea) that with the cornea forms the outer covering of the eyeball [syn: sclerotic coat]

Wikipedia
Sclera

The sclera, also known as the white of the eye, is the opaque, fibrous, protective, outer layer of the eye containing collagen and elastic fiber. In humans, the whole sclera is white, contrasting with the coloured iris, but in other mammals the visible part of the sclera matches the colour of the iris, so the white part does not normally show. In the development of the embryo, the sclera is derived from the neural crest. In children, it is thinner and shows some of the underlying pigment, appearing slightly blue. In the elderly, fatty deposits on the sclera can make it appear slightly yellow.

The human eye is relatively rare for having an iris that is small enough for its position to be plainly visible against the sclera. This makes it easier for one individual to infer where another individual is looking, and the cooperative eye hypothesis suggests this has evolved as a method of nonverbal communication.

Usage examples of "sclera".

Since almehneht have some of the same copper-containing protein as the ometvaheem, his sclera was aqua too, a lighter aqua though.

However Jenny felt a little relief, seeing dark aqua sclera, giving his eyes some normalcy.

His eyes were a watery grayish blue, the sclera laced with broken vessels, and the right one had a cloudy cast.

Her skin was a deep, chocolate brown, the sclera of her eyes the pale yellow of pine nuts.

The conjunctiva appeared t6 be a normal pink, but in the smooth white sclera I could discern the faintest tinge of yellow.

The conjunctiva, sclera, and the mucous membranes of the mouth were a dirty chocolate colour.

I almost snatched at his eyelids in my anxiety but there was no sign of jaundice in the sclera nor in the mucous membranes of the mouth.

He had a gash down his belly and part of his bowels protruded, protected by a thin membrane of whitish sclera, but Gunnie thought the animal could be saved since none of the intestine had actually been cut and the herniated gash was not too long in length.

Obermeyer made stab wounds in the sclera and introduced his cutting and sucking instruments.

Like marbles were those eyes, with great black spots set in pearl-white sclera without other colour.

Seer of the Future had eyes that were perfect mirrors, with no pupil, iris, or sclera to delineate them.

The Schoolman glanced at the dawn in their peripherya great crimson sclera about a golden iris.

I coated my sclera with a hard and glassy membrane, and, unblinking, I stalked home with my supplies through a fierce and growing wind.

One look into her eyes revealed only the aspect of the person beholding her, for her scleras were silver reflective mirrors, the irises shaped like the tiny hourglass mark a black widow carries on its belly.

Eyes nearly shut under the heavy lids, yellowish scleras surrounding nearly black irises.