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The Collaborative International Dictionary
Quinary

Quinary \Qui"na*ry\, a. [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.

Douglas Harper's Etymology Dictionary
quinary

c.1600, from Latin quinarius "consisting of five, containing five," from quint "five each" (see five).

Wiktionary
quinary

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

Wikipedia
Quinary

Quinary ( base-) is a numeral system with five as the base. A possible origination of a quinary system is that there are five fingers on either hand. The base five is stated from 0–4.

In the quinary place system, five numerals, from 0 to 4, are used to represent any real number. According to this method, five is written as 10, twenty-five is written as 100 and sixty is written as 220.

As five is a prime number, only the reciprocals of the powers of five terminate, although its location between two highly composite numbers ( 4 and 6) guarantees that many recurring fractions have relatively short periods.

Today, the main usage of base 5 is as a biquinary system, which is decimal using five as a sub-base. Another example of a sub-base system, is sexagesimal, base 60, which used 10 as a sub-base.

Each quinary digit has log5 (approx 2.321928094887362) bits of information.

Usage examples of "quinary".

The quinary circle wasn’t half finished, the perfection incomplete—and since meeting Temzia, the need to conclude had ceased to dominate his every waking thought.

With the same advantages Samuel Dodgers had made junk of all existing Quinary radar systems and the tactics and strategy built around those systems.

Newbold regarded some letters of this reduced quinary text as equivalent to one another because of phonetic similarity.