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Definition of Pentad
1. Noun. The cardinal number that is the sum of four and one.
Exact synonyms: 5, Cinque, Fin, Five, Fivesome, Little Phoebe, Phoebe, Quint, Quintet, Quintuplet, V
Generic synonyms: Digit, Figure
Generic synonyms: Digit, Figure
Definition of Pentad
1. 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.
2. a. Having the valence of a pentad.
Definition of Pentad
1. a group of five [n -S]
Medical Definition of Pentad
1.