De*cus"sate (?), De*cus"sa*ted (?), a.
1.
Crossed; intersected.
2. Bot.
Growing in pairs, each of which is at right angles to the next pair above or below; as, decussated leaves or branches.
3. Rhet.
Consisting of two rising and two falling clauses, placed in alternate opposition to each other; as, a decussated period.
© Webster 1913.