pentad

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pentad

/ˈpɛnˌtæd/ US
/ˈpɛntad/ UK

Where it comes from

From Ancient Greek πεντάς (pentás), from πέντε (pénte, “five”) + -άς (-ás, “-ad”). By surface analysis, pent- + -ad.

noun pentads

Synonym of quinquennium: a five-year period, especially in reference to the first and second halves of calendrical decades.
Similar: quinquennium
A five-day period, especially a temperature average taken every five days.
A five-day division of the Chinese calendar, forming part of a solar term (Chinese: 候).
A pentavalent element or group: an atom or molecule with a valence of five, comparable with five atoms of hydrogen. Nitrogen is a pentad in the ammonium compounds.

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MLA

"pentad." Wiktionary, via Micwyn, micwyn.com/word/pentad. Accessed 6 Nov. 2026.

APA

pentad. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/pentad

Chicago

"pentad." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/pentad.

BibTeX

@misc{pentad_2026,
  title = {pentad},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/pentad},
  urldate = {2026-11-06}
}