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decussate

[v. dih-kuhs-eyt, dek-uh-seyt; adj. dih-kuhs-eyt, -it] /v. dɪˈkʌs eɪt, ˈdɛk əˌseɪt; adj. dɪˈkʌs eɪt, -ɪt/
verb (used with object), verb (used without object), decussated, decussating.
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.
Origin
1650-1660
1650-60; < Medieval Latin decussātus divided in the form of an X (past participle of decussāre), equivalent to Latin decuss(is) the numeral ten, orig., a ten-as weight (dec(em) ten + -ussis, combining form of as as2) + -ātus -ate1
Related forms
decussately, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for decussate

decussate

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
Derived Forms
decussately, adverb
decussation, noun
Word Origin
C17: from Latin decussāre, from decussis the number ten, from decem ten
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for decussate
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.

Online Etymology Dictionary, © 2010 Douglas Harper
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decussate in Medicine

decussate de·cus·sate (dĭ-kŭs'āt', děk'ə-sāt')
v. de·cus·sat·ed, de·cus·sat·ing, de·cus·sates
To cross or become crossed so as to form an X; intersect. adj.
Intersected or crossed in the form of an X.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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