decussate

verb (used with or without object), de·cus·sat·ed, de·cus·sat·ing.

1. to cross in the form of an X; intersect.

adjective

2. in the form of an X; crossed; intersected.
3. Botany. arranged along the stem in pairs, each pair at right angles to the pair next above or below, as leaves.

verb (dɪˈkʌseɪt)

1. to cross or cause to cross in the form of the letter X; intersect

adjective (dɪˈkʌseɪt, dɪˈkʌsɪt)

2. in the form of the letter X; crossed; intersected
3. botany (esp of leaves) arranged in opposite pairs, with each pair at right angles to the one above and below it

v.

1650s, from Latin decussatus, past participle of decussare “to divide crosswise, to cross in the form of an ‘X,'” from decussis “the figure ‘ten'” (in Roman numerals, represented by X) from decem “ten” (see ten). As an adjective, from 1825.

v.

1. To cross or become crossed so as to form an X; intersect.

adj.

1. Intersected or crossed in the form of an X.