Definition of periodic in English:

periodic

adjective

  • 1Appearing or occurring at intervals.

    ‘the periodic visits she made to her father’
    • ‘Emotion is kept in check - rage and pain appear suddenly, like periodic explosions.’
    • ‘We further enhance the safety by periodic rebalancing of the weaker and stronger fund.’
    • ‘Each recommended practice is reviewed and revised as appropriate at regular periodic intervals.’
    • ‘Although it can be frightening, periodic breathing typically causes no other problems in newborns.’
    • ‘The training should be provided to all ranks from the highest to the lowest and should be given at periodic intervals, not just at the start of the job.’
    • ‘Maintaining the transformation merits and requires a periodic update on where social history stands.’
    • ‘Some economists argue that periodic credit crunches are the price emerging markets must pay for faster growth.’
    • ‘Therefore, we recommend that periodic surveys for flying squirrels continue at approximately 10 year intervals.’
    • ‘Roofs are like heating and cooling systems: The equipment needs periodic cleaning and tuning for peak efficiency.’
    • ‘Having experienced spells of acute water scarcity at periodic intervals, people do lament over the waste of the precious resource in such times.’
    • ‘So every one of our portfolios has always been planned and recommended for periodic rebalancing.’
    • ‘Despite this, he has continued to appear regularly at our periodic family gatherings, and is considered a family member in good standing.’
    • ‘A baby who has periodic breathing resumes regular breathing on his or her own.’
    • ‘By contrast, the letting of the basement on a weekly tenancy is an example of a periodic tenancy.’
    • ‘At this stage, the client needs periodic support as well as training in relapse prevention.’
    • ‘At periodic intervals, the iron bars at the mouth of narrow roads, put up to prevent the entry of heavy vehicles, are knocked down by lorries, due to reckless driving.’
    • ‘Leases for a fixed term and periodic tenancies are the types of lease most frequently encountered.’
    • ‘New Zealand is to present its next periodic report on compliance with the UN convention in September this year.’
    • ‘They crop up in one form or the other at periodic intervals.’
    • ‘The continued need for 6-yearly periodic reviews has also been questioned.’
    regular, periodical, at fixed intervals, recurrent, recurring, repeated, cyclical, cyclic, seasonal
    occasional, infrequent, intermittent, sporadic, spasmodic, odd
    View synonyms
  • 2Chemistry
    Relating to the periodic table of the elements.

    • ‘Bismuth is the fifth and last element in Group 15 of the periodic table.’
    • ‘The periodic table has since been expanded to 81 stable and 31 radioactive elements.’
    • ‘The study of oscillating reactions is the study of periodic changes in chemical reactions.’
    • ‘The first rough draft of the periodic elements signaled not the end but the beginning of chemistry.’
    • ‘The steadily increasing weights gave Mendeleyev, Meyer, and others a kind of index by which to order the elements and reveal their periodic behaviour.’
  • 3Relating to a rhetorical period.

    • ‘However, in the late 18th century there was a return to the periodic Latinate style.’

Origin

Mid 17th century: from French périodique, or via Latin from Greek periodikos coming round at intervals, from periodos (see period).

Pronunciation:

periodic

/ˌpɪərɪˈɒdɪk/