Retina (noun)

1. The delicate innermost coat of the eye that is composed of layers of nerve cells and that receives and transmits visual impulses to the brain.
2. A similar structure in certain invertebrates, such as the squid.

Origin:

Late latin retina, from latin, net, from retinēre to hold back.

Examples:

1. The doctor examined the patient's retina.
2. The retina is responsible for converting light into electrical signals.
3. The retina in the human eye is composed of millions of light-sensitive cells.
4. Retina display is a brand name used by Apple for its LCD and OLED displays that have higher resolution and color accuracy than traditional screens.
5. Retinal detachment is a serious eye condition that can cause blindness if not treated promptly.