- An example of a crux is the most important beliefs of a religion.
- An example of a crux is a Rubik's cube.
- Heraldry a cross
- a difficult problem; puzzling thing
- the essential or deciding point
- a small S constellation near the celestial pole, containing the Coalsack; the Southern Cross; the Cross
Origin of cruxL, cross
nounpl. crux·es or cru·ces
- The basic, central, or critical point or feature: the crux of the matter; the crux of an argument.
- A puzzling or apparently insoluble problem.
Origin of cruxProbably short for Medieval Latin crux (interpretum), torment (of interpreters), from Latin crux, cross.
Origin of CruxModern Latin, from Latin crux, cross.
(plural cruxes or cruces)
Latin crux (“a cross”)