Cru"cial (kr?"shal), a. [F.
crucial, fr. L. crux, crucis, cross,
torture. See Cross.] 1. Having the
form of a cross; appertaining to a cross; cruciform;
intersecting; as, crucial ligaments; a crucial
incision.
2. Severe; trying or searching, as if
bringing to the cross; decisive; as, a crucial
test.