heptad

noun
hep·​tad | \ ˈhep-ˌtad How to pronounce heptad (audio) \

Definition of heptad

: a group of seven

First Known Use of heptad

1660, in the meaning defined above

History and Etymology for heptad

Greek heptad-, heptas, from hepta

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The first known use of heptad was in 1660

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Cite this Entry

“Heptad.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heptad. Accessed 6 Aug. 2020.

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