eyespot

1. (biology, countable) Any of various primitive light-sensitive organs or regions in many diverse organisms.Examples: "The eyespot is a complex sandwich of membranes with rows of granules that contain around 200 different proteins, including the same rhodopsins found in the retina of our own eye."countable

2. (countable) An eye-like marking on the tail of a peacock or the wing of a butterfly.Synonyms: ocelluscountable

3. (botany, countable) A coloured spot in a motile gamete or spore, which is sensitive to light.countable

4. (botany) Any of a group of fungal infections of grasses that are characterized by oval spots; strawbreaker.countableuncountable