QUINARY
Etymology
Adjective
quinary (not comparable)
Of fifth rank or order.
Consisting of five things; arranged in fives.
(arithmetic) To the base of five; represented by the numerals 0, 1, 2, 3 and 4.
Noun
quinary (plural quinaries)
(astrology) Any of 72 rays associated with the Sun, six for each of the 12 houses of the Zodiac.
Source: Wiktionary
Qui"na*ry, a. Etym: [L. quinarius, from quini five each, akin to
quinque five: cf. F.quinaire. See Five.]
Definition: Consisting of five; arranged by fives. Boyle. Quinary system
(Zoöl.), a fanciful classification based on the hypothesis that each
group contains five types.
Source: Webster’s Unabridged Dictionary 1913 Edition