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2017 Word of the Year

optic chiasma

or optic chiasm

noun
1.
a site at the base of the forebrain where the inner half of the fibers of the left and right optic nerves cross to the opposite side of the brain.
Origin of optic chiasma
1870-1875
First recorded in 1870-75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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