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[2x]
: Pâ Pæ Pè Pé Pœ P- P. P/ P< Pa Pb Pc Pd Pe Pf Ph Pi Pj Pk Pl Pm Pn Po Pp Pr Ps Pt Pu Pv Pw Px Py
pentad
CIDE DICTIONARY
pentad, n. [Gr. penta`s penta`dos, a body of five, fr. pe`nte 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. [1913 Webster]
- Any grouping of five things. [PJC]
pentad, a.
Having the valence of a pentad. [1913 Webster]
OXFORD DICTIONARY
pentad, n.
1 the number five.
2 a group of five.
1 the number five.
2 a group of five.
Etymology
Gk pentas -ados f. pente five
For further exploring for "pentad" in Webster Dictionary Online
