pentad.
Synonym of quintet: A group of five things, particularly
Meaning & usage
Synonym of quintet: A group of five things, particularly Synonym of quinquennium: a five-year period, especially in reference to the first and second halves of calendrical decades.
Synonym of quintet: A group of five things, particularly A five-day period, especially a temperature average taken every five days.
Synonym of quintet: A group of five things, particularly A five-day division of the Chinese calendar, forming part of a solar term (Chinese: 候).
Synonym of quintet: A group of five things, particularly 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.
Where this word comes from
From Ancient Greek πεντάς (pentás), from πέντε (pénte, “five”) + -άς (-ás, “-ad”). By surface analysis, pent- + -ad.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.