pentad

名词 n.
中文释义
英 /ˈpɛntad/    美 /ˈpɛnˌtæd/

英文释义

名词 n.
  1. 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.
  2. Synonym of quintet: A group of five things, particularly; A five-day period, especially a temperature average taken every five days.
  3. 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).
  4. 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.

词形变化

pentads plural

词汇关系

衍生词
pentadic Reynolds' pentad

词源

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