periodic, occasional
(adjective) recurring or reappearing from time to time; “periodic feelings of anxiety”
periodic, periodical
(adjective) happening or recurring at regular intervals; “the periodic appearance of the seventeen-year locust”
Source: WordNet® 3.1
periodic (not comparable)
Relative to a period or periods.
Having repeated cycles.
Synonym: cyclic
Occurring at regular intervals.
Synonyms: cyclic, Thesaurus:periodic
Periodical.
(astronomy) Pertaining to the revolution of a celestial object in its orbit.
Antonym: non-periodic
(mathematics, stochastic processes, of a state) For which any return to it must occur in multiples of time steps, for some .
Antonym: aperiodic
(rhetoric) Having a structure characterized by periodic sentences.
periodic (not comparable)
Relating to the highest oxidation state of iodine; Of or derived from a periodic acid.
• poricide
Source: Wiktionary
Per`i*od"ic, a. Etym: [Pref. per- + iodic.] (Chem.)
Definition: Pertaining to, derived from, or designating, the highest oxygen acid (HIO
Pe`ri*od"ic, Pe`ri*od"ic*al, a. Etym: [L. periodicus, Gr. périodique.]
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.)
Definition: 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. The trigonomertic functions, as sin x, tan x, etc., are periodic functions. Exponential functions are also periodic, having an imaginary period, and the elliptic functions have not only a real but an imaginary period, and are hence called doubly periodic.
– Periodic law (Chem.), the generalization that the properties of the chemical elements are periodic functions of their atomic wieghts. "In other words, if the elements are grouped in the order of their atomic weights, it will be found that nearly the same properties recur periodically throughout the entire series." The following tabular arrangement of the atomic weights shows the regular recurrence of groups (under I., II., III., IV., etc.), each consisting of members of the same natural family. The gaps in the table indicate the probable existence of unknown elements. TABLE OF THE PERIODIC LAW OF THE CHEMICAL ELEMENTS (The vertical columns contain the periodic groups) Series1{ 2{ 3{ 4{ 5{ 6{ 7{ 8{ 9{ 10{ 11{ 12{ --------------------------------------------------------- -----|I. II. III. IV. V. VI. VII. VIII. | RH4 RH3 RH3 RH |R2O RO R3O3
Source: Webster’s Unabridged Dictionary 1913 Edition
18 June 2024
(noun) an extended (often showy) succession of persons or things; “a parade of strollers on the mall”; “a parade of witnesses”
The word “coffee” entered the English language in 1582 via the Dutch “koffie,” borrowed from the Ottoman Turkish “kahve,” borrowed in turn from the Arabic “qahwah.” The Arabic word qahwah was traditionally held to refer to a type of wine.
