- to cross in the form of an X; intersect.
- in the form of an X; crossed; intersected.
- Botany. arranged along the stem in pairs, each pair at right angles to the pair next above or below, as leaves.
Origin of decussate
Examples from the Web for decussate
Decussate, arranged in pairs which successively cross each other, 71.
Thus, leaves normally opposite and decussate may, by fusion, become alternate.Vegetable Teratology
Maxwell T. Masters
The remaining fibres pass down as the direct pyramidal tract, and decussate in the cord near their termination.
These are sometimes marked with a decussate cross, as was done to facilitate fracture during administration.The Catacombs of Rome
William Henry Withrow
The whorls or pairs alternate or cross each other, usually at right angles, that is, they decussate.
- to cross or cause to cross in the form of the letter X; intersect
- in the form of the letter X; crossed; intersected
- botany (esp of leaves) arranged in opposite pairs, with each pair at right angles to the one above and below it
Word Origin and History for decussate
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.
- To cross or become crossed so as to form an X; intersect.
- Intersected or crossed in the form of an X.