decussate(redirected from decussations)
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Related to decussations: decussation of pyramids
tr. & intr.v. de·cus·sat·ed, de·cus·sat·ing, de·cus·sates
To cross or become crossed so as to form an X; intersect.
1. Intersected or crossed in the form of an X.
2. Botany Arranged on a stem in opposite pairs, at right angles to those above or below: decussate leaves.
[Latin decussāre, decussāt-, from decussis, the number ten, intersection of two lines (from the Romans' use of X for the numeral 10), a ten-as coin : decem, ten; see dekm̥ in Indo-European roots + assis, as (coin).]
to cross or cause to cross in the form of the letter X; intersect
1. in the form of the letter X; crossed; intersected
2. (Botany) 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•cus•sate(v. dɪˈkʌs eɪt, ˈdɛk əˌseɪt; adj. dɪˈkʌs eɪt, -ɪt)
v. -sat•ed, -sat•ing,
adj. v.t., v.i.
1. to cross in the form of an X; intersect.adj.
2. having the form of an X.
3. arranged along the stem in pairs, each pair at right angles to the next pair, as leaves.
[1650–60; < Medieval Latin decussātus divided in the form of an X, past participle of decussāre, derivative of Latin decussis the numeral ten, orig., a ten-as weight (dec(em) ten + -ussis, comb. form of as as2)]
Past participle: decussated
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|Verb||1.||decussate - cross or intersect so as to form a cross; "this nerve decussates the other"; "the fibers decussate"|
cross - meet and pass; "the trains crossed"
|Adj.||1.||decussate - crossed or intersected in the form of an X|
crossed - placed crosswise; "spoken with a straight face but crossed fingers"; "crossed forks"; "seated with arms across"