From en.wikipedia.org:
_For the base-8 numeral system, see octal ._ An OCTONARY is an eight-line section in a poem, song or psalm.[1] The most notable example is found in Psalm 119[2]
In the French renaissance the octonaire became a form of moralizing chanson.
It can also mean of 8th rank or order (primary, secondary, tertiary … octonary).
** References
[reflist] Category:Poetic forms
[poetry-stub]