pentad

/หˆpษ›ntรฆd/

IPA: /P EH0 N T AE0 D/

noun
  1. 1

    A group or series of five things.

  2. 2

    A mean average value of temperature, etc., taken every five days.

  3. 3

    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.

    โ€œNitrogen is a pentad in the ammonium compounds.โ€

Synonyms

Source: https://en.wiktionary.org/wiki/pentad