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Index
: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9
[2x]
: 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
pentacrinite | pentacrinoid | pentacrinus | pentacron | pentacrostic | pentad | pentadactyl | pentadactyle | pentadactyloid | pentadecane | pentadecatoic

pentad

 : 
Noun
 : 
pen=tad

CIDE DICTIONARY

pentadn. [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]
pentada. 
     Having the valence of a pentad.  [1913 Webster]

OXFORD DICTIONARY

pentad, n.
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


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