Noun crux has 2 senses
  1. Southern Cross, Crux, Crux Australis - a small conspicuous constellation in the southern hemisphere in the Milky Way near Centaurus
    --1 is a kind of constellation
    --1 is a member of Milky Way, Milky Way Galaxy, Milky Way System
    --1 has members: Alpha Crucis; Beta Crucis
  2. crux, crux of the matter - the most important point
    --2 is a kind of point
    --2 has particulars: alpha and omega
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