01 n. An atom or radical which has a valence of eight, or is octavalent.
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1.
An atom or radical which has a valence of eight, or is octavalent.(Chem.)
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2.
A group of eight things.
Entry
2 senses
Webster, 1913
Octad
· Oc·tad
· IPA /ˈɑkˌtæd/