I. ˈde-kə-ˌsāt, di-ˈkə-ˌsāt verb
( -sat·ed ; -sat·ing )
Etymology: Latin decussatus, past participle of decussare to arrange crosswise, from decussis the number ten, numeral X, intersection, from dec em + ass-, as unit — more at ace
Date: 1658
: intersect , cross
II. ˈde-kə-ˌsāt, di-ˈkə-sət adjective
Date: circa 1823
: arranged in pairs each at right angles to the next pair above or below
decussate leaves