1. 
   Pentad
   A period of 5 days. See also: Time.
   Found op http://www.diracdelta.co.uk/science/source/p/e/pentad/source.html
   
   
2. 
   Pentad
   Pen'tad noun [ Greek ..., ..., a body of five, from ... five.] (Chemistry) 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 ...
   Found op http://www.encyclo.co.uk/webster/P/48
   
   
3. 
   Pentad
   Pen'tad adjective (Chemistry) Having the valence of a pentad.
   Found op http://www.encyclo.co.uk/webster/P/48
   
   
4. 
   pentad
   <chemistry> 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. ... Origin: Gr, a body of five, fr. Five. ... <chemistry> Havi...
   Found op http://www.mondofacto.com/facts/dictionary?pentad
   
   
5. 
   Pentad
   • (a.) Having the valence of a pentad. • (n.) 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.
   Found op http://thinkexist.com/dictionary/meaning/pentad/
   
   
6. 
   pentad
   a unit of quantity equal to 5.
   Found op http://www.unc.edu/~rowlett/units/dictP.html
   
   
7. 
   pentad
   a unit of time equal to 5 days. This unit is common in meteorology, where forecasts are frequently made for periods of 5 days at a time.
   Found op http://www.unc.edu/~rowlett/units/dictP.html
   
   
8. 
   pentad
   Type: Term Pronunciation: pen′tad Definitions: 1. A collection of five things in some way related. 2. In chemistry, a pentavalent element.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=66696
   
   
9. 
   pentad
   1) 5 2) Basketball team, e.g. 3) Cinque 4) Digit 5) Figure 6) Fin 7) Five 8) Fivesome 9) Group of five 10) Little phoebe 11) Phoebe 12) Quint 13) Quintet 14) Quintuplet 15) The senses, e.g. 16...
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/pentad/1
   
   

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