eyespot

noun
eye·​spot | \ ˈī-ˌspät How to pronounce eyespot (audio) \

Definition of eyespot

1 : a usually small spot of color (as on the wing of a butterfly) that resembles an eye
2a : a simple visual organ of pigment or pigmented cells covering a sensory termination : ocellus
b : a small pigmented body of various unicellular algae
3 : any of several fungal diseases of cultivated grasses (such as corn, wheat, and sugarcane) characterized by yellowish oval lesions on the leaves and stem

Examples of eyespot in a Sentence

a tie having eyespots of blue on a light gray background
Recent Examples on the Web The eyespot is studded with light-sensitive proteins called channelrhodopsins. Marc Zimmer, The Conversation, 5 Aug. 2021 Some of the earliest renditions might have been a simple pit eye, a kind of pit of tissue lined with light receptors, or what scientists call an eyespot, a simple region that detects light. Leslie Nemo, Scientific American, 19 May 2021 It’s a creepy little critter, with a single, distinctive black eyespot at the head of one to four spines. Popular Science, 17 Feb. 2021 During two days in October, these break off from the rest of the worm, and using an eyespot within, swim toward the surface—and the light of the moon. Douglas Main, National Geographic, 17 Apr. 2019 Scientists suspect eyespots first evolved in Jurassic lacewings and then a second time in modern butterflies. Rachael Lallensack, Smithsonian, 7 June 2019 Butterflies use the eyespots on their hindwings not for stealth but to scare away potential predators. Carrie Arnold, National Geographic, 21 Dec. 2016 Dakin repeated part of Petrie’s eyespot-snipping experiment. Susan Milius, WIRED, 27 Apr. 2011

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'eyespot.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of eyespot

1798, in the meaning defined at sense 1

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Time Traveler for eyespot

Time Traveler

The first known use of eyespot was in 1798

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Dictionary Entries Near eyespot

eyes pop out of one's head

eyespot

eye-spotted

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Cite this Entry

“Eyespot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/eyespot. Accessed 27 Nov. 2021.

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More Definitions for eyespot

eyespot

noun
eye·​spot | \ ˈī-ˌspät How to pronounce eyespot (audio) \

Medical Definition of eyespot

1 : a simple visual organ of pigment or pigmented cells covering a sensory termination : ocellus
2 : a small pigmented body of various unicellular algae

More from Merriam-Webster on eyespot

Britannica.com: Encyclopedia article about eyespot

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