heptad definition

  • noun:
    • an organization or variety of seven.
    • a group of seven things
    • An atom with a valence of seven, and that could be theoretically coupled with, substituted for, or replaced by, seven monad atoms or radicals. Additionally made use of as an adjective.
    • the sum seven products; the quantity seven.
    • In chem., an atom whose equivalence is seven atoms of hydrogen, or that can be combined with, substituted for, or changed by seven atoms of hydrogen.
    • In music, in the duodenal system of evaluation, a scheme of seven shades, formed by uniting two duodenal cells of four shades.
    • the cardinal quantity that's the amount of six and another

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