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What is the difference between periodic and periodical?

periodic | periodical |

As adjectives the difference between periodic and periodical

is that periodic is relative to a period or periods while periodical is periodic.

As a noun periodical is

a publication issued regularly, but less frequently than daily.

periodic

English

Alternative forms

* periodick (obsolete)

Etymology 1

From (etyl) .

Adjective

(-)
  • Relative to a period or periods.
  • Having repeated cycles.
  • *{{quote-book, year=1899, author=(Stephen Crane)
    • , title=, chapter=1 , passage=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 […].”}}
  • Occurring at regular intervals.
  • Periodical.
  • (label) Pertaining to the revolution of a celestial object in its orbit.
  • For which any return to it must occur in multiples of k time steps, for some k>1.
  • (label) Having a structure characterized by periodic sentences.
  • (label) Relating to, derived from, or designating, the highest oxygen acid (HIO) of iodine.
    • Antonyms
    * (astronomy) non-periodic * (mathematics) aperiodic
    Derived terms
    (terms derived from periodic) * periodic classification * periodic function * periodic law * periodic system * periodic table
    Related terms
    * period * periodicity

    Etymology 2

    Adjective

    (-)
  • Of or derived from a periodic acid.
    • Derived terms
    * periodate * periodic acid English heteronyms ----

    periodical

    English

    (wikipedia periodical)

    Noun

    (en noun)
  • A publication issued regularly, but less frequently than daily.
  • A publication that appears at fixed intervals.
  • A publication that often contains the most current information in the field, on every conceivable topic, often in greater detail than other publication formats.
  • The primary means for communication of original scholarship or creative work at the cutting edge of research in almost all fields.

    • Synonyms

    * (a publication that appears at fixed intervals) serial

    References

    * www.onelook.com * encarta.msn.com/encnet/features/dictionary/DictionaryResults.aspx?refid=1861725056

    Adjective

    (en adjective)
  • Periodic.
  • * Sir J. Herschel
    • The periodical times of all the satellites.
  • * {{quote-magazine, year=2012, month=March-April
    • , author=Anna Lena Phillips , title=Sneaky Silk Moths , volume=100, issue=2, page=172 , magazine=(American Scientist) citation , passage=Last spring, the periodical cicadas emerged across eastern North America. Their vast numbers and short above-ground life spans inspired awe and irritation in humans—and made for good meals for birds and small mammals.}}
  • Published at regular intervals of more than one day, especially weekly, monthly, or quarterly.
  • * Courthope
    • To influence opinion through the periodical press.
  • Of, or relating to such a publication.

    • Anagrams

    *