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pentad - Meaning and Examples

Meaning of 'pentad' (Webster Dictionary)

1 . Pentad [ a.]
- Having the valence of a pentad.
2 . Pentad [ n.]
- 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.