A light-sensitive pigmented spot on the bodies of invertebrate animals such as flatworms, starfishes, and microscopic crustaceans, and also in some unicellular organisms.
- ‘However, this eyespot probably cannot form an acute image but merely acts as a light sensor.’
- ‘However, pigmented eyespots are visible in wild-type larvae and late-stage embryos.’
- ‘They do not have image-forming eyes, but many species have pigment cells and photoreceptors concentrated into eyespots.’
- ‘However, when the pigmented eyespot is absent, the light penetrates the body and the front-to - back contrast is reduced.’
- ‘Its eyespots, located at the ends of the arms, sense light.’
2A rounded eyelike marking on an animal, especially on the wing of a butterfly or moth.
- ‘For a second or two, the whale is so close that I can see its white eyespot, and then it dives.’
- ‘The colorful eyespots on butterfly wings may be patterned by a mechanism similar to that used to organize the proximo-distal axis of the insect leg.’
- ‘Further, close observations of agonistic interactions revealed that individuals who were the first to display the eyespot were almost invariably the winners and ultimate social dominants.’
- ‘A relationship between eyespot phenotype and N and Dll expression is demonstrated in a loss-of-eyespot mutant in which N and Dll expression is reduced at missing eyespot sites.’
- ‘The bodies are light and ill-defended, except for the armored face, which is designed to draw attacks to it, like the eyespots on butterfly wings.’
- ‘The beautiful eyespots on butterfly wings are thought to rely on the principles described above, although involving more morphogens.’
- ‘Its wings are mottled brown, small eyespots dotting the scalloped edges here and there, small circles with tails on them.’
- ‘Butterfly eyespots have become a popular model system for the study of evolution and development.’
- ‘Pupae with low ecdysteroid levels develop into adults with small eyespots on their wings.’
- ‘The male's head is blue and brown, and both sexes have bold, black eyespots at the napes of their necks.’
3A fungal disease of cereals, sugar cane, and other cultivated grasses, characterized by yellowish oval spots on the leaves and stems.
- ‘Where eyespot is over threshold the preferred fungicide would be cyprodinil although Punch and Landmark both have some activity against eyespot and can give useful control.’
- ‘The percentage of stems affected by damaging lesions of eyespot at 22.1pc was the highest on record.’
- ‘The pathogen survives on corn debris, so reduced tillage and continuous corn create a high-risk environment for development of eyespot, especially if there is heavy residue and a history of it in that location.’
- ‘The eyespot fungus survives in the residue of infected plants for 3 or more years and is most severe under cool, wet conditions.’
- ‘There have been reports of Physoderma brown spot, anthracnose, and eyespot developing in Illinois cornfields.’
We take a look at several popular, though confusing, punctuation marks.