Heptad meaning

hĕp'tăd'
A group or series of seven.
noun
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A series or group of seven.
noun
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A group of seven things.
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Origin of heptad

  • Greek heptas heptad- the number seven from hepta seven septm̥ in Indo-European roots
    From American Heritage Dictionary of the English Language, 5th Edition
  • hepta- +‎ -ad
    From Wiktionary