Definition of: decussate

(di·kus′āt, dek′ə·sāt) v.i. ·sat·ed, ·sat·ing
To intersect; cross in the form of the letter X; interlace.
—adjective (di·kus′āt, -it)
1. Crossed; intersected.
2. Bot. Having each pair of leaves at right angles with the pair next below or above: also de·cus′sat·ed. [<L decussatus, pp. of decussare mark with an X <decussis the number ten, X]
—de·cus′·sate·ly adverb