de·cus·sate /ˈdɛkəˌset, dɪˈkʌˌset/
 (vt.)(vi.)(使)交叉成X形,(使)交叉成十字形(a.)交叉的,直角交叉的,X形的
 de·cus·sate /ˈdɛkəˌset, dɪˈkəsˌet/ 動詞
 交叉,交叉的,交互對生的
 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.
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 De·cus·sate v. t. [imp. & p. p. Decussated; p. pr. & vb. n. Decussating.]  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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 decussate
      adj : crossed or intersected in the form of an X [syn: intersectant,
             intersecting]
      v : cross or intersect so as to form a cross; "this nerve
          decussates the other"; "the fibers decussate"