optic chiasma
or optic chiasm
noun
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
1First recorded in 1870–75
Words Nearby optic chiasma
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use optic chiasma in a sentence
Pressure on the optic chiasma, for example by a tumour of the pituitary body, is associated with bilateral temporal hemianopsia.
Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition. | Alexander MilesThe optic chiasma, where present, is involved in the floor of the thalamencephalon and forms a large, upwardly-projecting ridge.
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