choroid coat

American  

noun

Ophthalmology.

1. a pigmented, highly vascular membrane of the eye that is continuous with the iris and lies between the sclera and the retina, functioning to nourish the retina and absorb scattered light.

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Etymology

Origin of choroid coat

First recorded in 1735–45

Example Sentences

Between the sclerotic and the subjacent choroid coat is a lymph space traversed by some loose pigmented connective tissue,—the 92 lamina fusca.

From Project Gutenberg

What is the color of the external surface of the choroid coat?

From Project Gutenberg

The choroid coat is a bell-shaped, dark membrane which lines the sclerotic.

From Project Gutenberg

From this he concludes, that the defect of vision is owing to the want of the choroid coat, and, consequently, that this coat is the proper organ of vision.

From Project Gutenberg

The choroid coat, which constitutes the second investing membrane of the eye, is of a dark brown color upon its outer surface, and of a deep black within.

From Project Gutenberg