decussate

decussate

[v. dih-kuhs-eyt, dek-uh-seyt; adj. dih-kuhs-eyt, -it]
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:
1650–60; < 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

decussately, adverb
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World English Dictionary
decussate
 
vb
1.  to cross or cause to cross in the form of the letter X; intersect
 
adj
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
 
[C17: from Latin decussāre, from decussis the number ten, from decem ten]
 
de'cussately
 
adv
 
decus'sation
 
n

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Etymonline
Word Origin & History

decussate
1650s, from L. decussat-, pp. stem of decussare "to cross in the form of an 'X,'" from decussis "the figure 'ten'" (in Roman numerals, represented by X) from decem "ten."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

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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