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period noun

  /ˈpi.ɹɪd/ , /ˈpɪə.ɹi.əd/ , /ˈpɪə.ɹɪ.əd/ , /ˈpɪɚ.i.əd/ , /ˈpɪɹ.i.əd/
  • A length of time in history seen as a single coherent entity; an epoch, era. [from 16th c.]
 時代
  • (now, chiefly, North America, Philippines) The punctuation mark “.” (indicating the ending of a sentence or marking an abbreviation).
 句点, ピリオド, 。, 終止符
  • (chemistry) A row in the periodic table of the elements. [from 19th c.]
 周期
  • The length of time during which the same characteristics of a periodic phenomenon recur, such as the repetition of a wave or the rotation of a planet. [from 17th c.]
 周期, 期間
  • (geology) A geochronologic unit of millions to tens of millions of years; a subdivision of an era, and subdivided into epochs.
 紀

periodic adjective

  /ˌpɪə-/ , /ˌpɪɹiˈɑdɪk/ , /ˌpɪɹiˈɒdɪk/
  • Relative to a period or periods.
  • Having repeated cycles.
  • Occurring at regular intervals.
  • (astronomy) Pertaining to the revolution of a celestial object in its orbit.
 周期的

periodical noun

  /ˌpɪəɹiˈɒdɪkl̩/ , /ˌpɪɹiˈɑdɪkl̩/
  • A regularly issued thematic publication that contains the most current information in its field, often the primary means for communication of original scholarship or creative work at the cutting edge of research in its field.
 定期刊行物

periodicity noun

  • The quality of being periodic; tendency to recur at regular intervals.
 周期性
Meiji period
明治時代
period drama
時代劇
incubation period
潜伏期間
high season busy business period
かきいれどき
period of incubation
潜伏期
special kana usage of the ancient period mainly
上代特殊かなづかい
free period
ウインドウ
menstrual period
月経
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