D defs.my
Entry 2 senses Webster, 1913

Crucial

/(kr?"shal)/ · Cru·cial · IPA /ˈkɹuː.ʃəl/
01 a. Having the form of a cross; appertaining to a cross; cruciform; intersecting; as, crucial ligaments; a crucial incision.
  1. 1.
    Having the form of a cross; appertaining to a cross; cruciform; intersecting; as, crucial ligaments; a crucial incision.
  2. 2.
    Severe; trying or searching, as if bringing to the cross; decisive; as, a crucial test.