Definition of octonary in English:

octonary

adjective

rare
  • Relating to or based on the number eight.

    • ‘It is apparent that the pattern of distribution in many families of geophilomorphs shows an excess of octonary forms.’
    • ‘Base 8 is called octonary or octal.’

Pronunciation:

octonary

/ˈɒktə(ʊ)n(ə)ri/