eyespot (eye|spot)

noun

• 1 Zoology a light-sensitive pigmented spot on the bodies of invertebrates such as flatworms, starfishes, and microscopic crustaceans, and also in some unicellular organisms.

• 2a rounded eye-like marking on an animal, especially on the wing of a butterfly or moth.

• 3 [mass noun] a fungal disease of cereals and other cultivated grasses, characterized by yellowish oval spots on the leaves and stems.

  • The fungus is typically Pseudocercosporella herpotrichoides, subdivision Deuteromycotina