[de.cus.sate] vb -sat.ed ; -sat.ing [L decussatus, pp. of decussare to arrange crosswise, fr. decussis the number ten, numeral X, intersection, fr. decem + ass-, as unit--more at ace] (1658): intersect, cross
[2]de.cus.sate adj (ca. 1823): arranged in pairs each at right angles to the next pair above or below "~ leaves"