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Definition of Chiasm
1. Noun. An intersection or crossing of two tracts in the form of the letter X.
Generic synonyms: Anatomical Structure, Bodily Structure, Body Structure, Complex Body Part, Structure
Specialized synonyms: Chiasma Opticum, Optic Chiasm, Optic Chiasma
Derivative terms: Chiasmal, Chiasmatic, Chiasmic, Decussate
Definition of Chiasm
1. n. A commissure; especially, the optic commissure, or crucial union of the optic nerves.
Definition of Chiasm
1. Noun. (alternative form of chiasma) ¹
2. Noun. (alternative form of chiasmus) ¹
¹ Source: wiktionary.com
Definition of Chiasm
1. chiasma [n -S] - See also: chiasma
Medical Definition of Chiasm
1. 1. The crossing of intertwined chromosomes during prophase. Synonym: chiasma. Origin: G. Chiasma (05 Mar 2000)
Lexicographical Neighbors of Chiasm
Literary usage of Chiasm
Below you will find example usage of this term as found in modern and/or classical literature:
1. Diseases of the nervous system: A Text-book of Neurology and Psychiatry by Smith Ely Jelliffe, William Alanson White (1917)
"B. Disease at or about the chiasm.—The anatomical peculiarities, due to the
crossing of the fibers at the chiasm, introduces certain definite signs which ..."
2. The Nervous System and Its Constituent Neurones: Designed for the Use of by Lewellys Franklin Barker (1899)
"It follows a tolerably isolated course as far as the chiasm, occupying the
latero-ventral portion of the transverse section of the optic nerve. ..."
3. Annals of Ophthalmology (1904)
"may produce alteration in the structure and function of the chiasm; for example:
New growths springing from the body of the sphenoid bone; fracture of the ..."
4. A Practical Treatise on Ophthalmology by Lawrance Webster Fox (1920)
"chiasm IN ATROPHY OK THE LEFT OPTIC NERVE. Magnified 3 X i. The specimen is from
a man, sixty-five years of age, whose left eye had been blind from ..."
5. Medical Ophthalmology by Arnold Herman Knapp (1918)
"The two optic nerves then converge to form the chiasm. OPTIC chiasm.—A study of
the relation of the chiasm to the sphenoid body shows ..."
6. Journal of Nervous and Mental Disease by Philadelphia Neurological Society, American Neurological Association, Chicago Neurological Society, New York Neurological Association (1887)
"CASES OF chiasm-LESION. ... hemianopsia of the peripheral or neural form, probably
caused by a lesion of the optic chiasm. None of these cases are completed ..."
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