Crossword clues for periodic
periodic
- Regular exercise - shaving seconds off an Olympic record?
- Appearing at intervals
- Happening at intervals
- Table in chemistry class
- At fixed intervals
- Table for chemists?
- Like the table that hangs in a lab
- Like magazine mailings
- Like a table made with silver and gold?
- Chemist's table?
- ___ table (chemistry class topic)
- Chart of elements
- He is second on it
- Kind of table in chemistry class
- Like a planetary orbit
- Regular
- Like Mendeleev's table
- Intermittent
- Cyclical
- Malicious sprite associated with verses having repetitious spells?
- Occurring at intervals
- Occasional table's description, if it contains 9?
- Occasional inverted commas primarily seen after full stop
- Occasional class I caught
- Full stop in Chaucer initially recurring at intervals
- Like a table in the chemistry lab?
Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Periodic \Per`i*od"ic\, a. [Pref. per- + iodic.] (Chem.) Pertaining to, derived from, or designating, the highest oxygen acid (HIO?) of iodine.
Periodic \Pe`ri*od"ic\, Periodical \Pe`ri*od"ic*al\, a. [L. periodicus, Gr. ?: cf. F. p['e]riodique.]
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Of or pertaining to a period or periods, or to division by periods.
The periodicaltimes of all the satellites.
--Sir J. Herschel. Performed in a period, or regular revolution; proceeding in a series of successive circuits; as, the periodical motion of the planets round the sun.
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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. -
(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. 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. [1913 Webster] 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[
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----- |I. II. III. IV. V. VI. VII. VIII. | RH4 RH3 RH3 RH |R2O RO R3O3 RO2 R2O5 RO3 R2O7 RO4
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----- H 1 [1913 Webster] Li 7 [1913 Webster] Na 23 [1913 Webster] K 39 [1913 Webster] (Cu) 63 [1913 Webster] Rb 8 -
2 [1913 Webster] (Ag) (108) [1913 Webster] Cs 133 [1913 Webster] (-) [1913 Webster] (-) [1913 Webster] (Au) (197) [1913 Webster] (-)
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---Note: A similar relation had been enunciated in a crude way by Newlands; but the law in its effective form was developed and elaborated by Mendelejeff, whence it is sometimes called Mendelejeff's law. Important extensions of it were also made by L. Meyer. By this means Mendelejeff predicted with remarkable accuracy the hypothetical elements ekaboron, ekaluminium, and ekasilicon, afterwards discovered and named respectively scandium, gallium, and germanium.
Periodic star (Astron.), a variable star whose changes of brightness recur at fixed periods.
Periodic time of a heavenly body (Astron.), the time of a complete revolution of the body about the sun, or of a satellite about its primary.
Douglas Harper's Etymology Dictionary
1640s, from French périodique (14c.), from Latin periodicus, from periodus (see period).\n
\nPeriodic table in chemistry (1889) is from notion of the arrangement, in which similar properties recur at intervals in elements in the same area as you read down the rows of the table. This sense of the word is attested from 1872 (periodic law).
Wiktionary
Etymology 1 a. 1 relative to a period or periods. 2 Having repeat cycles. Etymology 2
a. Of or derived from a periodic acid.
WordNet
adj. happening or recurring at regular intervals [syn: periodical] [ant: aperiodic]
recurring at regular intervals
recurring or reappearing from time to time; "periodic feelings of anxiety"
Wikipedia
Usage examples of "periodic".
Ted made periodic visits to this particular bookstore, where he routinely autographed however many copies of his backlist titles were in stock.
Dion kept his job as brewmaster, and Jerry put up with periodic absences.
The first theory, proposed by Val LaMarche and Tom Harlan, based on the testimony of California bristlecone pines, was that the periodic temperature minimums recorded by tree rings were caused by volcanic eruptions.
SACHS first clearly pointed out the important difference between the action of light in modifying the periodic movements of leaves, and in causing them to bend towards its source.
Over the past twenty years pearling had become a highly lucrative activity despite periodic slumps in the world market for mother-of-pearl and disasters such as the cyclone that wiped out forty luggers and several hundred men.
Bipolar disorder, periodic antisocial behavior, manic episodes of moderate severity, grandiose and persecutory delusions.
Duchesne mentions an instance of complete amenorrhea, in which the ordinary flow was replaced by periodic sweats.
Ted made periodic visits to this particular bookstore, where he routinely autographed however many copies of his backlist titles were in stock.
Mendeleev predicted that the blanks in his periodic table would be filled with elements of certain atomic weights and properties.
I had done my best to keep it home-like, hoping for a restoration of the relative simplicity of the suburban villa this palace had once been, but the architects were infected with the new notions of Constantinian grandeur, and only in this room, whose walls were hung with British weavings, and where striped British rugs covered the cold mosaic floor, did I feel truly warm enough to keep at bay the periodic attacks of shortened breath that plagued me in the winter.
He is responsible for the orbits of about half the periodic comets in the Solar System.
I suffered monthly from periodic pains which at times were so acute as to render life a burden.
The perifocal zone, or regions of periodic epidemics, including the ports of the tropical Atlantic and Africa.
They learned the periodic table of elements, the name of every part of the body, the biological kingdoms and phyla, all the known planets of all the known solar systems, even the four-letter coded DNA sequences surrounding a hundred and twenty disease genes.
Barham records a case similar to the foregoing, in which the menstruation assumed the character of periodic purpura.