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optic nerve
noun Anatomy.
either one of the second pair of cranial nerves, consisting of sensory fibers that conduct impulses from the retina to the brain.
Origin:
1605–15
1605–15
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Optic nerve
is always a great word to know.
So is femur. Does it mean:
| the part of the trunk between the neck and the abdomen, enclosed by the ribs, sternum, and vertebrae, which contains the heart and lungs; the chest |
| the thighbone of the human leg, extending from the pelvis to the knee, that is the longest, largest, and strongest in the body |
Collins
World English Dictionary
| optic nerve | |
| —n | |
| the second cranial nerve, which provides a sensory pathway from the retina to the brain | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary
optic nerve n.
A nerve that originates from the retina, passes out of the eye socket to the chiasm, where part of its fibers cross to the opposite side and pass to the geniculate bodies and anterior quadrigeminal body. Also called second cranial nerve.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
| optic nerve
Either of the second pair of cranial nerves, which carry sensory information relating to vision from the retina of the eye to the brain. Disease or injury of the optic nerve can result in partial or total blindness. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia Britannica
Encyclopedia
optic nerve
second cranial nerve, which carries sensory nerve impulses from the more than one million ganglion cells of the retina toward the visual centres in the brain. The vast majority of optic nerve fibres convey information regarding central vision
Learn more about optic nerve with a free trial on Britannica.com.
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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