**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.

© Webster 1913.

**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.