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octad

noun
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oc·​tad | \ ˈäkˌtad \
plural -s

Definition of octad

: a group or arrangement of eight especially : a group of eight figures representing consecutive powers of ten in ancient mathematical notation

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History and Etymology for octad

Greek oktad-, oktas number eight, body of eight men, from okta- octa- + -ad-, -as -ad

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“Octad.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/octad. Accessed 15 December 2019.

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