Answer: octonary

AnswerCrossword Clue
octonarya stanza of eight lines
octonarynumber in an octonary system
octonarypertaining to the number 8
octonarystanza of eight lines
octonaryof or pertaining to the number system with base 8, employing the numerals 0 through 7
octonaryproceeding by eight
octonaryconsisting of eight
octonarygroup of eight; ogdoad