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View synonyms for heptad
heptad
[ hep-tad ]
noun
- the number seven.
- a group of seven.
- Chemistry. an element, atom, or group having a valence of seven.
heptad
/ ˈhɛptæd /
noun
- a group or series of seven
- the number or sum of seven
- an atom or element with a valency of seven
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Word History and Origins
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Word History and Origins
Origin of heptad1
C17: from Greek heptas seven
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Example Sentences
But this oddness belongs to other numbers also (pentad, heptad, &c.).
From Project Gutenberg
Heptad, a term in chemistry to denote an atom that is the equivalent of seven atoms of hydrogen, from hepta, seven.
From Project Gutenberg
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