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pentad

From Wiktionary, the free dictionary

English

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Etymology

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From Ancient Greek πεντάς (pentás), from πέντε (pénte, five) + -άς (-ás, -ad), equivalent to pent- +‎ -ad.

Pronunciation

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Noun

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pentad (plural pentads)

  1. Synonym of quintet: A group of five things, particularly
    1. Synonym of quinquennium: a five-year period, especially in reference to the first and second halves of calendrical decades.
    2. (climatology) A five-day period, especially a temperature average taken every five days.
    3. A five-day division of the Chinese calendar, forming part of a solar term (Chinese: ).
    4. (chemistry) 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.

Coordinate terms

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Derived terms

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Translations

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References

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Anagrams

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Haitian Creole

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Etymology

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From French pintade.

Pronunciation

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Noun

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pentad

  1. guinea fowl
  2. (figurative) shy and cowardly (person)

Derived terms

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