Hypertext Webster Gateway: "Decussating"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Decussate \De*cus"sate\, v. t. [imp. & p. p. {Decussated}; p.
pr. & vb. n. {Decussating}.] [L. decussatus, p. p. of
decussare to cross like an X, fr. decussis (orig. equiv. to
decem asses) the number ten, which the Romans represented by
X.]
To cross at an acute angle; to cut or divide in the form of
X; to intersect; -- said of lines in geometrical figures,
rays of light, nerves, etc.
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