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- adj. Alternative spelling of noncrossing.
Sorry, no etymologies found.
You can even turn it into a Venn diagram by connecting the tops and bottoms of the pairs of curly braces with non-crossing lines.
Consequently, 18 people around a round table can shake hands with each other in non-crossing ways, in 280 different ways, including rotations.
The non-crossing cycle (iv) corresponds to the open, non-penetrated window of the cage molecule.
Illustration of the three crossing cycles (i-iii) and the non-crossing cycle (iv) of a cage molecule in the interlocked dimer, as highlighted in yellow.