pentad

English - English

Definition of pentad in English English dictionary

the number five

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

five: the cardinal number that is the sum of four and one

{i} five; quintet, group of five, series of five; period of five years; (Chemistry) atom that has a valence of five; (Meteorology) period of five days in a row

a group or series of five things

Having the valence of a pentad

Hyphenation

pen·tad