{ } a. 1. Crossed; intersected. [ 1913 Webster ]

2. (Bot.) Growing in pairs, each of which is at right angles to the next pair above or below; as, decussated leaves or branches. [ 1913 Webster ]

3. (Rhet.) Consisting of two rising and two falling clauses, placed in alternate opposition to each other; as, a decussated period. [ 1913 Webster ]