1 definition found From The Collaborative International Dictionary of English v.0.44 [gcide]: Quinary \Qui"na*ry\, adjective [L. quinarius, from quini five each, akin to quinque five: cf. F. quinaire. See {Five}.] Consisting of five; arranged by fives. --Boyle. {Quinary system} (Zo["o]l.), a fanciful classification based on the hypothesis that each group contains five types.

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