Quaternity Definition
    noun
  
 (countable) A group or set of four.
Wiktionary 
(uncountable) The state of being four; fourness.
Wiktionary 
Synonyms: 
  
- quadruplet
- quartet
- little-joe
- foursome
- tetrad
- quaternary
- quaternion
- quatern
- iv
- 4
- four
Other Word Forms of Quaternity
Noun
Singular:
 quaternityPlural:
 quaternitiesOrigin of Quaternity
-  Latin quaternitas From Wiktionary 
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