Definify.com
Webster 1913 Edition
Pentad
Pen′tad
,Noun.
[Gr.
πεντάσ
πεντάδος
, a body of five, fr. πέντε
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 compoundsPen′tad
,Adj.
(Chem.)
Having the valence of a pentad.
Definition 2024
pentad
pentad
English
Noun
pentad (plural pentads)
- a group or series of five things
- (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.
- Nitrogen is a pentad in the ammonium compounds.