from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The vascular middle layer of the eye constituting the iris, ciliary body, and choroid.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The middle of the three concentric layers that make up the eye; it is pigmented and vascular, and comprises of the choroid, the ciliary body, and the iris.
from the GNU version of the Collaborative International Dictionary of English
- n. The posterior pigmented layer of the iris; -- sometimes applied to the whole iris together with the choroid coat.
from The Century Dictionary and Cyclopedia
- n. The vascular tunic of the eye; the iris, ciliary body, and choroid taken collectively. Also called tunica uvea and uveal tract.
- n. The dark choroid coat of the eye. See cut under eye.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the part of the eye that contains the iris and ciliary body and choroid
Uveitis is a swelling of the uvea, which is the middle layer of the eye.
Melanoma starts in the uvea, where melanocytes generate your eye color.
The uvea perforata (posterior layer of iris), though the definitions are not in all cases quite clear and definite.
The cornea arises from the sclerotic tunic, the uvea and secundina take their origin from the pia mater, and the conjunctiva from a thin pellicle or membrane which covers the exterior of the cranium and is nourished by a transudation of the blood through the coronal suture.
This pigmented epithelium is named the pars iridica retinæ, or, from the resemblance of its color to that of a ripe grape, the uvea.
This double layer is known as the pars ciliaris retinæ, and can be traced forward from the ciliary processes on to the back of the iris, where it is termed the pars iridica retinæ or uvea.
Da Porta's in optics, demonstrated the valves of the veins, and the function of the uvea in vision, divined the uses of the telescope and thermometer.
The proper coats of the eye are reckoned five in number; viz. the sclerotica, cornea, choroides, iris or uvea, and the retina.
In the human eye the whole choroid coat, and even the interior surface of the iris or uvea, is lined with a black mucus; this mucus, or as it is called, pigmentum, is darkest in young persons, and becomes more light coloured as we advance in years.
The line ALLB, immediately within the former, represents the choroides; the part APB is the iris or uvea, in which the hole at P is the pupil.