pentad
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English[edit]
Etymology[edit]
From Ancient Greek πεντάς (pentás), from πέντε (pénte, “five”) + -άς (-ás, “-ad”), equivalent to pent- + -ad.
Pronunciation[edit]
- (General American) IPA(key): /ˈpɛnˌtæd/
- (Received Pronunciation) IPA(key): /ˈpɛntad/
- Hyphenation: pen‧tad
Noun[edit]
pentad (plural pentads)
- 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.
- (climatology) 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).
- (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[edit]
- (group) monad, duad/dyad, triad, tetrad, pentad, hexad, hebdomad/heptad, ogdoad/octad, ennead/nonad, decad/decade, hendecad, dodecad/duodecade, chiliad
Derived terms[edit]
Translations[edit]
five-year period
|
climatology: five-day period
five-day division of the Chinese calendar
|
chemistry: pentavalent element or group
References[edit]
- “pentad, n.”, in OED Online , Oxford, Oxfordshire: Oxford University Press, 2022.
Anagrams[edit]
Haitian Creole[edit]
Etymology[edit]
Pronunciation[edit]
Noun[edit]
pentad
- guinea fowl
- (figurative) shy and cowardly (person)
Derived terms[edit]
Categories:
- English terms borrowed from Ancient Greek
- English terms derived from Ancient Greek
- English terms prefixed with pent-
- English terms suffixed with -ad
- English 2-syllable words
- English terms with IPA pronunciation
- English lemmas
- English nouns
- English countable nouns
- en:Climatology
- en:Chemistry
- English terms with usage examples
- en:Collectives
- en:Five
- Haitian Creole terms derived from French
- Haitian Creole terms with IPA pronunciation
- Haitian Creole lemmas
- Haitian Creole nouns
- ht:Fowls