• English redware with marbled slip decoration, 1625-50 period or earlier, unearthed at Jamestown
    English redware with marbled slip decoration, 1625-50 period or earlier, unearthed at Jamestown
  • WordNet 3.6
    • adj periodical happening or recurring at regular intervals "the periodic appearance of the seventeen-year locust"
    • n periodical a publication that appears at fixed intervals
    • ***

Additional illustrations & photos:

Hilt and portion of blade of a swept-hilt rapier excavated at Jamestown of the 1600-1610 period Hilt and portion of blade of a swept-hilt rapier excavated at Jamestown of the 1600-1610 period
A few of thousands of clay pipe fragments unearthed at Jamestown. The ones shown range in date from 1600 to 1700. During this 100-year period, pipes developed from small bowls to fairly large ones A few of thousands of clay pipe fragments unearthed at Jamestown. The ones shown range in date from 1600 to 1700....
Light Comedy Man of the Period Light Comedy Man of the Period

Webster's Revised Unabridged Dictionary
  • Interesting fact: An elephant in the wild can eat anywhere from 100 - 1000 pounds of vegetation in a 16 hour period
    • n Periodical A magazine or other publication which appears at stated or regular intervals.
    • Periodical 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.""To influence opinion through the periodical press."
    • Periodical Of or pertaining to a period or periods, or to division by periods. "The periodical times of all the satellites."
    • Periodical (Rhet) Of or pertaining to a period; constituting a complete sentence.
    • Periodical Performed in a period, or regular revolution; proceeding in a series of successive circuits; as, the periodical motion of the planets round the sun.
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: The Black Death reduced the population of Europe by one third in the period from 1347 to 1351.
    • periodical Having a period; performed in a fixed period or cycle; appearing, occurring, or happening at stated intervals; regularly or statedly recurring at the end of a fixed period of time: as, periodical diseases; periodical publications.
    • periodical Of or pertaining to magazines, newspapers, or other publications which appear or are published at regularly recurring intervals.
    • n periodical A publication issued at regular intervals in successive numbers or parts, each of which (properly) contains matter on a variety of topics, and no one of which is contemplated as forming a book by itself.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: The most snow accumulation in a one-day period was 75.8 inches at Silver Lake, Colorado, in April 1921.
    • adjs Periodical pertaining to a period: happening by revolution: occurring at regular intervals: pertaining to periodicals
    • ns Periodical a magazine or other publication which appears in parts at regular periods
    • ***


  • Alfred North Whitehead
    “Periods of tranquillity are seldom prolific of creative achievement. Mankind has to be stirred up.”
  • Søren Kierkegaard
    Søren Kierkegaard
    “During the first period of a man's life, the danger is not to take the risk.”
  • Pearl Bailey
    Pearl Bailey
    “There is a period of life when we swallow knowledge of ourselves and it becomes either good or sour inside.”
  • George Bernard Shaw
    “It is difficult, if not impossible, for most people to think otherwise than in the fashion of their own period.”
  • Jane Bryant Quinn
    Jane Bryant Quinn
    “The shortest period of time lies between the minute you put some money away for a rainy day and the unexpected arrival of rain.”
  • Frederick (Carl) Frieseke
    Frederick (Carl) Frieseke
    “The truth simply is that's all. It doesn't need reasons: it doesn't have to be right: it's just the truth. Period.”


Webster's Revised Unabridged Dictionary
L. periodicus, Gr. : cf. F. périodique,
Chambers's Twentieth Century Dictionary
Fr.,—L.,—Gr. periodosperi, around, hodos, a way.


In literature:

Would such material lend itself to use in every recitation period?
"A Guide to Methods and Observation in History" by Calvin Olin Davis
The period was one of experimentation.
"The Governments of Europe" by Frederic Austin Ogg
This period again might almost be called the culminating period of English rhetoric.
"English Literature and Society in the Eighteenth Century" by Leslie Stephen
We have, however, better testimony than a copy made at a later period.
"Chinese Painters" by Raphael Petrucci
The eruptions were not continuous over the whole field; now in this place, now in that, there came long periods of quiet.
"The Western United States" by Harold Wellman Fairbanks
Edinburgh periodical, conducted by Dr James Anderson.
"The Modern Scottish Minstrel, Volumes I-VI." by Various
It is not enough to dust the tops of the books periodically; a more full and radical remedy is required, to render library books presentable.
"A Book for All Readers" by Ainsworth Rand Spofford
Mr. Miller and Mr. Murray served after the Reconstruction Period and most of Gen. Smalls' service was after that period.
"The Journal of Negro History, Volume 5, 1920" by Various
It is not suppressed in France until 1834, after a period of six centuries.
"The Choctaw Freedmen" by Robert Elliott Flickinger
During the period of pain sweat is poured out freely.
"Special Report on Diseases of the Horse" by United States Department of Agriculture

In poetry:

That lifts the soul above the clod,
And, working out some period
Of art, is part and proof of God.
"Beauty And Art" by Madison Julius Cawein
Those mighty periods of years
Which seem to us so vast,
Appear no more before Thy sight
Than yesterday that's past.
"The First Six Verses Of The Ninetieth Psalm Versified" by Robert Burns
How many periods are past,
And we in exile lingering,
By enemies encompassed fast,
Who jeer that now we have no King!
"Establish Peace" by Shlomo ibn Gabirol
Shall sun or cycle yet confirm
Your lordship to the unceded Vast,
Or human period outlast
The vigil of Capella's term?
"The Testimony of the Suns" by George Sterling
And are you glad as I am glad that we have died so young,
Before the May dew off my feet, the honey off your tongue
Had died and dried? And are you glad there is no period set
To this, our loving after death, Margaret?
"The Dead Lovers" by Nora Jane Hopper Chesson
And what will folks say if they see you afraid?
It reflects upon me as I knew not my trade:
Courage, Friend, for to-day is your period of sorrow,
And things will go better believe me to-morrow.
Derry down, down, hey derry down.
"The Thief And Cordelier. A Ballad" by Matthew Prior

In news:

NOAA Fisheries Service is reopening the public comment period for a proposed rule to create a seasonal closure to recreational fishing for greater amberjack in the Gulf of Mexico.
But it wasn't pressing enough to keep him from traveling during a recruiting period.
Among the 73 calls for medical and fire-rescue service received by the Arbutus Volunteer Fire Department during the period Sept 30 to Oct 7 were the following.
The debt ceiling crisis of 2011, perhaps more than any other period, tested President Obama's promise to bring bipartisanship back to Washington.
A periodic look at the largest new research projects.
Bighorn Comment Period Extended.
During a 13-day period, four were weighed over 400 pounds (422.5, 450.0, 630.5, 794.5).
Sales at Bloomsbury Publishing rose 2.5% in the six month period ended August 31, to £43.5 million, but pretax profits fell to £0.9 million from £1.5 million.
Periodically, I'll hit up Youtube and put "Owensboro" in the search engine to check out the latest videos from or about our fair city.
He will finish the period with $1,479,100 cash on hand.
March, April, May - in the Reading area was the warmest in the 112-year record period.
Jimmy Hayes put the Hawks on the board in the first period Thursday.
During this sale period, proceeds will be donated to the Poverello Center in Missoula.
There was no time for an adjustment period for the Washington Redskins and their new quarterback.
Net sales were $20.2 billion, a decrease of 1% versus the prior year period.

In science:

Consequently, we have been unable to derive a reliable period, and the period P = 0.357335 d that we present in Table 2 derived using the string-length method is probably a smaller period alias of the real period.
CCD time-series photometry of the globular cluster NGC 6981: Variable star census and physical parameter estimates
P (t) is the period at time t, P0 is the period at the epoch E , and β is the rate of period change.
CCD time-series photometry of the globular cluster NGC 6981: Variable star census and physical parameter estimates
Liouville integrability has been proved for an arbitrary simple Lie algebra in the cases of the periodic and non-periodic Toda lattices see , and in the case of non-periodic Full Kostant-Toda lattice by Gekhtman and Shapiro .
The integrability of the periodic Full Kostant-Toda on a simple Lie algebra
Apparently, the processes with discrete spectra are divided into periodic, non-periodic and almost periodic processes.
Suppression of random noise by the separation of frequencies
We define Π to be the “averaged” variability period, and ∆Π a change in the period during one period caused by the radial motion of a spot.
Slim accretion disks around black holes