eyespot

/ˈaɪˌspɑt/
noun
  1. A simple light-sensitive organ found in some animals, such as flatworms and jellyfish, that can detect light but not form clear images.
    • The eyespot on a single-celled organism can detect the direction of sunlight.
    • A flatworm uses its eyespots to sense whether it is in light or darkness.
    • Some jellyfish have eyespots that help them swim toward the surface.
  2. A round, colored mark on an animal's body that looks like an eye, often used to scare predators or attract mates.
    • Many butterflies have eyespots on their wings to make them look like larger animals.
    • The peacock's tail feathers have beautiful eyespots that shimmer in the light.
    • The eyespot on the fish's tail helps it confuse predators.
Synonyms
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