Word.ws English Dictionary

pentad

Syllables: pen·tad/ˈpɛntad/US/ˈpɛnˌtæd/

pentad noun: synonym of quinquennium: a five-year period, especially in reference to the first and second halves of calendrical decades.

Noun

pentad (plural pentads)

  1. Synonym of quinquennium: a five-year period, especially in reference to the first and second halves of calendrical decades.
    Synonyms:
    quinquennium
  2. 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: 候).
  4. 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.

pentad meaning in Tamil

pentad in Tamil

ஐந்து, ஐந்தன் இலக்கம், ஐந்தன் தொகுதி

Synonyms of pentad

Forms of pentad

pluralpentads

Origin of pentad

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

Words formed from pentad

Questions about pentad

What does pentad mean?
Pentad means synonym of quinquennium: a five-year period, especially in reference to the first and second halves of calendrical decades.
What is pentad in Tamil?
Pentad in Tamil is ஐந்து, ஐந்தன் இலக்கம், ஐந்தன் தொகுதி. See Pentad meaning in Tamil.
What part of speech is pentad?
Pentad is a noun.
How do you pronounce pentad?
Pentad is pronounced /ˈpɛnˌtæd/ (US).
What is the plural of pentad?
The plural of pentad is pentads.

Words near pentad in the dictionary

  1. pentacyclic
  2. pentacyclization
  3. pentacyclizations
  4. pentacyclosqualene
  5. pentacylindrical
  6. pentad
  7. pentadactyl
  8. pentadactyle
  9. pentadactylic
  10. pentadactylism
  11. pentadactyloid

Source and license

Adapted from Wiktionary: pentad (page history and authors); pentad (Tamil Wiktionary) (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Vealhurl-pentad.wav.

Cite this entry: “pentad.” Word.ws, https://word.ws/pentad. Based on Wiktionary, CC BY-SA 4.0.