(mathematics) To the base of five; represented by the numerals 0, 1, 2, 3 and 4.
From the LatinquÄ«nÄrius (“containing five each"), from quÄ«nÄ« (“five each", “five at a time") + -Ärius (whence the English suffix -ary); compare the Frenchquinaire, the Italianquinario, and the PortuguesequinÃ¡rio.
English Wiktionary. Available under CC-BY-SA license.
Or, on the quinary-binary system, we need only give independent definitions to the numbers up to five; the numbers six, seven,..
The introduction of these other symbols produces a compound scale, which may be called a quinarybinary, or, less correctly, a quinary-denary scale.
Thus 1878 in the quinary-binary scale would be 1131213, and 1828 would be 1130213; the meaning of these is seen at once by comparison with MDCCCLXXVIII and MDCCCXXVIII.
Examples of this are given in § 20; it is worthy of notice that the vigesimal (or, rather, quinary-quaternary) system was used by the Mayas of Yucatan, and also, in a more perfect form, by the Nahuatl (Aztecs) of Mexico.
If a quinary-binary system (such as would naturally fit in with counting on the fingers) is not adopted, teachers unconsciously resort to a binary-quinary system.