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Definition of octonary in English:

octonary

Pronunciation /ˈäktəˌnerē/ /ˈɑktəˌnɛri/

adjective

rare

  • Relating to or based on the number eight.

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