octonary
adjectiveUK /ˈɒktənəri/
US /ˈɑːktəneri/
Having to do with the number eight.
The old song had an octonary beat, with eight counts in every line.
OTHER MEANINGS
2. A group or set of eight things.
The dancers formed an octonary, eight in a row.
3. A number system that uses only the digits 0 through 7.
Computers sometimes use octonary to store numbers more compactly.
4. A poem or stanza made of eight lines.
The poet closed the collection with a gentle octonary about the sea.