pentad : Dictionary / Wörterbuch (BEOLINGUS, TU Chemnitz)

English Dictionary: pentad	by the DICT Development Group
3 results for pentad
From WordNet (r) 3.0 (2006) [wn]:
pentad n the cardinal number that is the sum of four and one [syn: five, 5, V, cinque, quint, quintet, fivesome, quintuplet, pentad, fin, Phoebe, Little Phoebe]
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Pentad \Pen"tad\, n. [Gr. [?], [?], a body of five, fr. [?] 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.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Pentad \Pen"tad\, a. (Chem.) Having the valence of a pentad.