英和和英

語源 1

From French périodique, from Medieval Latin periodicus (“cyclical”), from Latin periodus (“complete sentence, period, circuit”), from Ancient Greek περίοδος (períodos, “cycle, period of time”). By surface analysis, period +‎ -ic.

発音

• (Received Pronunciation) IPA: /ˌpɪɹiˈɒdɪk/, /ˌpɪə-/
• (General American) IPA: /ˌpɪɹiˈɑdɪk/
• 韻: -ɒdɪk
• ハイフネーション: pe‧ri‧od‧ic

形容詞

periodic (not comparable)

1. Relative to a period or periods.
2. Having repeated cycles.

   Synonym: cyclic

   • 1899, Stephen Crane, chapter 1, in Twelve O'Clock:

     There was some laughter, and Roddle was left free to expand his ideas on the periodic visits of cowboys to the town. “Mason Rickets, he had ten big punkins a-sittin' in front of his store, an' them fellers from the Upside-down-F ranch shot 'em up […].”

3. Occurring at regular intervals.

   Synonyms: cyclic; see also Thesaurus:periodic

4. Periodical.
5. (astronomy) Pertaining to the revolution of a celestial object in its orbit.

   Antonym: non-periodic

6. (mathematics, stochastic processes, of a state) For which any return to it must occur in multiples of ${\displaystyle k}$ time steps, for some ${\displaystyle k>1}$Antonym: aperiodic
7. (rhetoric) Having a structure characterized by periodic sentences.

派生語

関連する語

語源 2

From per- +‎ iodic.

発音

• enPR: "pûrīŏd'ĭk, IPA: /ˌpɜːɹaɪˈɒdɪk/

形容詞

periodic (not comparable)

1. Relating to the highest oxidation state of iodine; of or derived from a periodic acid.

派生語

アナグラム

• poricide