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eyespot

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eye⋅spot

  [ahy-spot]
Use eyespot in a Sentence
–noun
1. a sensory organ of lower animals, having a light-perceiving function.
2. an eyelike spot, as on the tail of a peacock; eye.
3. Plant Pathology. a disease of plants, characterized by elliptical lesions on the leaves and stems, stunting of growth, and rotting, caused by any of several fungi.
Origin:
1580–90; eye + spot
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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eye·spot   (ī'spŏt')   
n.  

  1. A small, light-sensitive patch of pigment in certain algae and unicellular organisms.

  2. A simple visual organ of certain invertebrates consisting of a sensory ending covered by light-sensitive, pigmented cells.

  3. A rounded eyelike marking, as on the tail of a peacock.

  4. Botany Either of two fungal diseases that affect grasses and are characterized by oval lesions.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: eye·spot
Pronunciation: 'I-"spät
Function: noun
1 : a simple visual organ of pigment or pigmented cells covering a sensorytermination : OCELLUS
2 : a small pigmented body of various unicellular algae
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Science Dictionary
eyespot   (ī'spŏt')  Pronunciation Key 

  1. An area that is sensitive to light and functions somewhat like an eye, found in certain single-celled organisms as well as many invertebrate animals.

  2. A round marking resembling an eye, as on the tail feather of a peacock.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia

eyespot

a heavily pigmented region in certain one-celled organisms that apparently functions in light reception. The term is also applied to certain light-sensitive cells in the epidermis (skin) of some invertebrate animals (e.g., worms, starfishes).

Learn more about eyespot with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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