Other
- Cardinal (name)
- Cardinal (color), a vivid red
- Cardinal (grape), a table grape first produced in California in 1939
- Cardinal number, a concept in mathematics
- Cardinal vowel, a concept in phonetics
- C/2008 T2 (Cardinal), a comet
- Cardinal, a Ruby programming language implementation using for the Parrot virtual machine
- The cardinal is also a fairy chess piece, also known as the archbishop
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