pentad

Noun

Synonyms: five 5 V cinque quint quintet fivesome quintuplet fin Phoebe Little Phoebe

WordNet 3.0

Noun (1)

the cardinal number that is the sum of four and oneSynonyms: five 5 V cinque quint quintet fivesome quintuplet fin Phoebe Little Phoebe

Webster's Dictionary (GCIDE)

Pentad \Pen"tad\, n. [Gr. penta`s penta`dos, a body of five, fr. pe`nte 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. [1913 Webster]

2.Any grouping of five things. [PJC]

Pentad \Pen"tad\, a. (Chem.) Having the valence of a pentad. [1913 Webster] Pentadactyl