Adjacent Words

pentad definitions

	Tweet

WordNet (r) 3.0 (2005)

n
1: 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]

Merriam Webster's

noun Etymology: Greek pentad-, pentas, from pente Date: 1653 a group of five

Oxford Reference Dictionary

n. 1 the number five. 2 a group of five. Etymology: Gk pentas -ados f. pente five

Webster's 1913 Dictionary

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.

Webster's 1913 Dictionary

Pentad Pen"tad, a. (Chem.) Having the valence of a pentad.