Pentad Definition

pĕntăd
noun
The number five.
Webster's New World
A series or group of five.
Webster's New World
A five-year period.
Webster's New World
A pentavalent element or radical.
Webster's New World

(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.
Wiktionary
Synonyms:

Other Word Forms of Pentad

Noun

Singular:
pentad
Plural:
pentads

Origin of Pentad

  • Greek pentas pentad- group of five from pente five penkwe in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

Pentad Sentence Examples

  • Those elements which are equivalent in combining or displacing power to a single atom of hydrogen are said to be univalent or monad elements; whilst those which are equivalent to two atoms of hydrogen are termed bivalent or dyad elements; and those equivalent to three, four, five or six atoms of hydrogen triad, tetrad, pentad or hexad elements.

  • Thus, it must be supposed that in nitric oxide, NO, an odd number of affinities are disengaged, since a single atom of dyad oxygen is united with a single atom of nitrogen, which in all its compounds with other elements acts either as a triad or pentad.

  • The oxide NO 2 must be regarded as another instance of a compound in which an odd number of affinities of one of the contained elements are disengaged, since it contains two atoms of dyad oxygen united with a single atom of triad or pentad nitrogen.

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Words Starting With

PPEPEN

Words Ending With

DADTAD

Unscrambles

pentad

Words Starting With P and Ending With D

Starts With P & Ends With DStarts With PE & Ends With DStarts With P & Ends With AD

Word Length

6 Letter Words6 Letter Words Starting With P6 Letter Words Ending With D