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optic chiasm

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.02 sec.
chiasm /chi·asm/ (ki´azm) a decussation or X-shaped crossing.
optic chiasm  the structure in the forebrain formed by the decussation of the fibers of the optic nerve from each half of each retina.

optic chiasm
n.
A flattened quadrangular body that is the point of crossing of the fibers of the optic nerves. Also called optic decussation.

optic chiasm
Etymology: Gk, optikos, sight, chiasma, crossed lines
a point near the thalamus and hypothalamus where parts of each optic nerve cross over.

optic chiasm (op´tik kī´azm),
n a point near the thalamus and hypothalamus at which portions of each optic nerve cross over.

chiasm
a decussation or Y-shaped crossing.

optic chiasm
a structure in the forebrain formed by the decussation of fibers of the optic nerve from each half of each retina.


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