Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of octavalent is as below...

Octad :: Octad (n.) An atom or radical which has a valence of eight, or is octavalent..

Octavalent :: Octavalent (a.) Having a valence of eight; capable of being combined with, exchanged for, or compared with, eight atoms of hydrogen; -- said of certain atoms or radicals..

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