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yellow spot

Ophthalmology, macula (def 2b).
1865-70 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for yellow spot
  • Some, but not all, tundras have a yellow spot at the base of the bill near the eye.
  • The head has a large yellowish crescent or blotch behind the eyes and a distinct yellow spot under the eye on the lower jaw.
  • The first segment has a large brownish yellow spot also positioned laterally and proximally.
  • The perianth is pale blue with a yellow spot in the center.
  • Its smooth shell was maybe four inches long with one yellow spot on each plate on the carapace.
  • Hatchlings have a brownish-gray carapace with a yellow spot on each scute and a central ridge.
British Dictionary definitions for yellow spot

yellow spot

(anatomy) another name for macula lutea
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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yellow spot in Medicine

yellow spot n.
See macula lutea.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for yellow spot

macula lutea

in anatomy, the small yellowish area of the retina near the optic disk that provides central vision. When the gaze is fixed on any object, the centre of the macula, the centre of the lens, and the object are in a straight line. In the centre of the macula is a depression, called the fovea, which contains specialized nerve cells that are exclusively of the type known as cones. Cones are associated with colour vision and perception of fine detail. Toward the centre of the macula there are no blood vessels to interfere with vision; thus, in this area, vision in bright light and colour perception are keenest.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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