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(), Pe°riod"ical ()} a.[L. periodicus, Gr. : cf. F. priodique.] 1. Of or pertaining to a period or periods, or to division by periods. The periodicaltimes of all the satellites. Sir J. Herschel. 2. Performed in a period, or regular revolution; proceeding in a series of successive circuits; as, the periodical motion of the planets round the sun. 3. Happening, by revolution, at a stated time; returning regularly, after a certain period of time; acting, happening, or appearing, at fixed intervals; recurring; as, periodical epidemics. The periodic return of a plant's flowering. Henslow. To influence opinion through the periodical press. Courthope. 4. (Rhet.) Of or pertaining to a period; constituting a complete sentence. Periodic comet (Astron.), a comet that moves about the sun in an elliptic orbit; a comet that has been seen at two of its approaches to the sun. Periodic function (Math.), a function whose values recur at fixed intervals as the variable uniformly increases Pe°riod"ical n.A magazine or other publication which appears at stated or regular intervals. スポンサード リンク
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