quinary

adjective
quina·​ry | \ ˈkwīnərē, -win-\

Definition of quinary

 (Entry 1 of 2)

1 : consisting of five : arranged by fives : quintuple the quinary system is based on counting the fingers of one hand— H. J. Spinden
2 : of the fifth order or rank

quinary

noun
\ "\
plural -es

Definition of quinary (Entry 2 of 2)

: a quinary group or system

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History and Etymology for quinary

Adjective

Latin quinarius, from quini five apiece + -arius -ary; akin to quinque five

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