from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A structure in the brain formed by the partial intersection or crossing of the optic nerve fibers on the underside of the hypothalamus.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the crossing of the optic nerves from the two eyes at the base of the brain


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    Sorry, no example sentences found.


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