pentad

listen to the pronunciation of pentad
English - English
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
pentad
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