decuss,v.rare.|dɪˈkʌs| [ad. L. decuss-āre to divide crosswise, or in the form of an X, f.decussis the number ten (X), also a ten-as piece, and so supposed to be f.dec(-em)assis.] = decussate v. 1782A. Monro Compar.Anat. (ed. 3) 25 A double row of..fibres decussing one another.