periodic

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.

A graph of the sine function, a periodic function

• (Received Pronunciation) IPA^(key): /ˌpɪɹiˈɒdɪk/, /ˌpɪə-/
• (General American) IPA^(key): /ˌpɪɹiˈɑdɪk/

• Audio (GA)

  (file)

• Rhymes: -ɒdɪk
• Hyphenation: pe‧ri‧od‧ic

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.

From per- +‎ iodic.

• enPR: "pûrīŏd'ĭk, IPA^(key): /ˌpɜːɹaɪˈɒdɪk/

  • Audio (Southern England)

    (file)

periodic (not comparable)

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

• poricide

periodic m pl

1. plural of periodich

Borrowed from Latin periodicus or Ancient Greek περιοδικός (periodikós) or French périodique. By surface analysis, period +‎ -ic.

periodic m or n (feminine singular periodică, masculine plural periodici, feminine and neuter plural periodice)

1. periodic