eyespot
/ˈaɪspɒt/Definitions
1. noun
A spot or patch of color on the body of an animal, especially one that serves as a warning signal to potential predators.
“The brightly colored eyespot on the butterfly’s wings warned predators of its distasteful taste.”
2. noun
A small area of the eye that is sensitive to light.
“The doctor examined the patient’s eyespot to check for signs of eye disease.”