eyespot

From eye +‎ spot.

• (UK) IPA^(key): /ˈʌɪspɒt/

eyespot (plural eyespots)

1. (biology) Any of various primitive light-sensitive organs or regions in many diverse organisms.
   • 2011, Terence Allen and Graham Cowling, The Cell: A Very Short Introduction, Oxford 2011, p. 12:

     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.

2. An eye-like marking on the tail of a peacock or the wing of a butterfly.
3. (botany) Any of a group of fungal infections of grasses that are characterized by oval spots.

• peyotes, typoese