Pen"tad (?), n. [Gr. , , a body of five, fr. five.] Chem.

Any element, atom, or radical, having a valence of five, or which can be combined with, substituted for, or compared with, five atoms of hydrogen or other monad; as, nitrogen is a pentad in the ammonium compounds.


© Webster 1913.

Pen"tad, a. Chem.

Having the valence of a pentad.


© Webster 1913.

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