Etymology
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decussate (v.)

"to intersect so as to form a figure like the letter X, to cross," 1650s, from Latin decussatus, past participle of decussare "to divide crosswise, to cross in the form of an 'X,'" from decussis "the figure 'ten'" (in Roman numerals, represented by X), also "a large copper coin ten times the value of an as," from decem "ten" (from PIE root *dekm- "ten"). Related: Decussated; decussating; decussation. As an adjective, by 1806.

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Definitions of decussate
1
decussate (v.)
cross or intersect so as to form a cross;
the fibers decussate
this nerve decussates the other
2
decussate (adj.)
crossed or intersected in the form of an X;
Synonyms: intersectant / intersecting
From wordnet.princeton.edu