From the Latin quīnārius (“containing five each”), from quīnī (“five each”, “five at a time”) + -ārius (whence the English suffix -ary); compare the French quinaire, the Italian quinario, and the Portuguese quinário.
quinary (not comparable)
- Of fifth rank or order.
- Consisting of five things; arranged in fives
- (mathematics) To the base of five; represented by the numerals 0, 1, 2, 3 and 4.