Quinary

Origin

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.

Adjective

1. Of fifth rank or order.
2. Consisting of five things; arranged in fives
3. (mathematics) To the base of five; represented by the numerals 0, 1, 2, 3 and 4.