- periodic, periodicalPeriodic is an adjective only, and although once largely restricted to technical and scientific contexts (e.g. periodic decimal, periodic function, and periodic table), it has become commoner in non-technical usage as well and is generally preferred to periodical in the meaning ‘appearing or occurring at regular intervals’
• (Smoke detectors require periodic checks to ensure that they are working properly —British Medical Journal, 2002).Periodical is also used in this sense, however, and unlike periodic is used as a noun with the particular meaning ‘a newspaper or magazine issued at regular intervals’.
Modern English usage. 2014.
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Periodic — Pe ri*od ic, Periodical Pe ri*od ic*al, a. [L. periodicus, Gr. ?: cf. F. p[ e]riodique.] 1. Of or pertaining to a period or periods, or to division by periods. [1913 Webster] The periodicaltimes of all the satellites. Sir J. Herschel. [1913… … The Collaborative International Dictionary of English
periodic — PERIÓDIC, Ă, periodici, ce, adj. 1. Care revine, care se repetă (regulat) după anumite intervale de timp (egale); care constă în parcurgerea repetată a aceleiaşi succesiuni de stări (în intervale de timp egale). ♢ Publicaţie periodică (şi… … Dicționar Român
periodic — [pir΄ē äd′ik] adj. [MFr periodique < L periodicus < Gr periodikos] 1. occurring, appearing, or recurring at regular intervals [a periodic fever] 2. occurring from time to time; intermittent 3. of or characterized by periods [the periodic… … English World dictionary
periodic — I adjective cadenced, cadent, continual, cyclic, cyclical, erratic, fluctuating, frequent, habitual, intermittent, measured, occasional, occurring again, oft repeated, oftentime, patterned, perpetual, reappearing, recurrent, recurring, regular,… … Law dictionary
periodic — (adj.) 1640s, from Fr. périodique (14c.), from L. periodicus, from periodus (see PERIOD (Cf. period)). Periodic table in chemistry is from notion of the arrangement, in which similar properties recur at intervals in elements in the same area as… … Etymology dictionary
Periodic — Per i*od ic, a. [Pref. per + iodic.] (Chem.) Pertaining to, derived from, or designating, the highest oxygen acid (HIO?) of iodine. [1913 Webster] … The Collaborative International Dictionary of English
periodic — *intermittent, recurrent, alternate Analogous words: *fitful, spasmodic, convulsive: sporadic, occasional (see INFREQUENT) … New Dictionary of Synonyms
periodic — [adj] at fixed intervals alternate, annual, at various times, centennial, cyclic, cyclical, daily, epochal, every once in a while, every so often, fluctuating, hourly, infrequent, intermittent, isochronal, isochronous, monthly, occasional, on… … New thesaurus
periodic — ► ADJECTIVE ▪ appearing or occurring at intervals. DERIVATIVES periodicity noun … English terms dictionary
periodic — periodic1 periodically, adv. /pear ee od ik/, adj. 1. recurring at intervals of time: periodic revivals of an interest in handicrafts. 2. occurring or appearing at regular intervals: periodic visits of a mail steamer to an island. 3. repeated at… … Universalium