1. Vitamin A (retinol) or a naturally occurring or synthetic substance chemically related to it. (Retinoid literally means “like retinol.”)
2. In ophthalmology, resembling the retina.
An animal form of Vitamin A. Retinol is converted from retinyl palmitate which is found in beef, chicken liver, eggs, fish liver oils, and dairy products including whole milk, whole mild yogurt and cottage cheese, butter, and cheese. (The plant based Vitamin A source is beta-carotene.) Vitamin A is essential to vision, especially night vision, […]
Any disease of the retina, the light-sensitive membrane at the back of the eye. The type of retinopathy is often specified, such as arteriosclerotic retinopathy, diabetic retinopathy, or hypertensive retinopathy.
- Retinopathy, arteriosclerotic
Splitting of the retina. From retina + -schisis (splitting).
Retrospective diagnosis. The proposal that the mysterious illness that killed Alexander the Great more than 2,300 years ago was West Nile fever is an exercise in retrodiagnosis.