crux

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crux / krəks; kroŏks/ • n. (pl. crux·es or cru·ces / ˈkroōˌsēz/ ) (the crux) the decisive or most important point at issue: the crux of the matter is that attitudes have changed. ∎  a particular point of difficulty.

Crux

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Crux / krəks; kroŏks/ Astron. another term for the Southern Cross. ∎  [as genitive] (Cru·cis / ˈkroōsis/ ) used with a preceding letter or numeral to designate a star in this constellation: the star Beta Crucis.

crux

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crux a cross (from Latin); the term is recorded from the mid 17th century, chiefly in crux ansata (‘cross with a handle’), a word for ankh. From the early 18th century, the figurative use of the decisive or most important point at issue is recorded.

crux

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crux pl. cruxes, cruces †conundrum, riddle XVIII; difficulty the solution of which perplexes XIX. — L., ‘CROSS 1’; short for crux interpretum, crux philosophorum torment of interpreters, of philosophers.