decussation

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dec·us·sa·tion

 (dĕk′ə-sā′shən, dē′kə-)
n.
1. A crossing in the shape of an X.
2. Anatomy An X-shaped crossing, especially of nerves or bands of nerve fibers, connecting corresponding parts on opposite sides of the brain or spinal cord.

de•cus•sa•tion

(ˌdi kəˈseɪ ʃən, ˌdɛk ə-)

n.
1. an instance of crossing or the condition of being crossed in the form of an X.
2. a nerve or tract of nerve fibers that crosses from one side of the central nervous system to the other.
[1650–60]

decussation

the state of being in the form of an X. See also joining.
See also: Form
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.decussation - an intersection or crossing of two tracts in the form of the letter X
anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing; "he has good bone structure"
chiasma opticum, optic chiasm, optic chiasma - the crossing of the optic nerves from the two eyes at the base of the brain
Translations

de·cus·sa·tion

n. decusación, cruzamiento de estructuras en forma de X;
___ of pyramids___ de las pirámides, cruzamiento de fibras nerviosas de una pirámide a otra en la médula oblongata;
optic ______ óptica, cruzamiento de las fibras del nervio óptico.