Examples of chiasm in a Sentence
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The first critical junction is the optic chiasm: the X-shaped crossing of optic nerve fibers beneath the brain where the visual pathways from each eye partially decussate, or cross over, to the opposite hemisphere.
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Scott Travers, Forbes.com, 27 May 2026
Not by accident, that spot is directly above and linked to the optic chiasm, the X where nerve cells from the left and right eyes cross.
—Dan Hurley, Discover Magazine, 4 Nov. 2016
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Scott Travers, Forbes.com, 27 May 2026
Not by accident, that spot is directly above and linked to the optic chiasm, the X where nerve cells from the left and right eyes cross.
—Dan Hurley, Discover Magazine, 4 Nov. 2016
Cite this Entry
“Chiasm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chiasm. Accessed 18 Jun. 2026.
Copy CitationMedical Definition
chiasm
noun
chi·asm
ˈkī-ˌaz-əm 
ˈkē-
ˈkē-
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