What does "decussation" mean?

A crossing or intersection of lines etc. so as to form an X-shape.

What is a synonym for "decussation"?

Common synonyms include: chiasm, chiasma, cross section, intersection, mesh.

Pronounced //dɛkʌˈseɪʃən//.

/dɛkʌˈseɪʃən/ noun

noun ·Rare ·Advanced level

Noun

1
A crossing or intersection of lines etc. so as to form an X-shape.
"[…] which being doubled at the angle, makes up the Letter χ, that is the Emphaticall decussation, or fundamentall figure."
2
an intersection or crossing of two tracts in the form of the letter X wordnet

"[…] which being doubled at the angle, makes up the Letter χ, that is the Emphaticall decussation, or fundamentall figure."

From Latin decussationem, from decussare.