- Also called period of rotation.the time in which a body rotates once on its axis.
- Also called period of revolution.the time in which a planet or satellite revolves once about its primary.
Origin of period
Synonyms for period
- characterized by a series of successive circuits or revolutions, as the motion of a planet or satellite.
- of or relating to a period, as of the revolution of a heavenly body.
Origin of periodic1
Examples from the Web for period
Contemporary Examples of period
The detectives are still at it, seeking to account for a period of time when Brinsley may well have paused to sit somewhere.Exclusive: Inside a Cop-Killer’s Final Hours
December 31, 2014
The idea that January 1st initiates a period of new beginning is not a flash of Hallmark brilliance.New Year’s Eve, Babylon Style
December 31, 2014
The idea of black Bond caused Limbaugh to exclaim on his show last week that Bond was “white and Scottish, period.”Rush Limbaugh’s Fear of a Black James Bond
December 29, 2014
Over the years, the meaning has evolved, essentially, to “Christmastime,” and describes the period between Dec. 24 and Jan. 6.The Most Confusing Christmas Music Lyrics Explained (VIDEO)
December 24, 2014
Like Lent, the season of Advent was a period of reflection and fasting, and items such as dairy and sugar were forbidden.One Cake to Rule Them All: How Stollen Stole Our Hearts
December 24, 2014
Historical Examples of period
No sir, not one, and I can find no sign of the Triassic period.
But in the end this period of suffering proved a real blessing.Ancient Man
Hendrik Willem van Loon
A period of quiescence then followed, lasting until, we will say, 1865.'Tis Sixty Years Since
Charles Francis Adams
Since that period a population of four millions has multiplied to twelve.
This period, beginning with 1840, has been styled "a memorable decade" in the history of Parliament.The Grand Old Man
Richard B. Cook
- a portion of time specified in some waythe Arthurian period; Picasso's blue period
- (as modifier)period costume
- the time taken to complete one cycle of a regularly recurring phenomenon; the reciprocal of frequencySymbol: T
- an interval in which the values of a periodic function follow a certain pattern that is duplicated over successive intervalssin x = sin ( x + 2π ), where 2π is the period
- the time required by a body to make one complete rotation on its axis
- the time interval between two successive maxima or minima of light variation of a variable star
Word Origin for period
early 15c., "course or extent of time," from Middle French periode (14c.) and directly from Medieval Latin periodus "recurring portion, cycle," from Latin periodus "a complete sentence," also "cycle of the Greek games," from Greek periodos "cycle, circuit, period of time," literally "a going around," from peri- "around" (see peri-) + hodos "a going, way, journey" (see cede).
Sense of "repeated cycle of events" led to that of "interval of time." Meaning "dot marking end of a sentence" first recorded c.1600, from similar use in Medieval Latin (in late 16c. English it meant "full pause at the end of a sentence"). Sense of "menstruation" dates from 1822. Educational sense of "portion of time set apart for a lesson" is from 1876. Sporting sense attested from 1898. As an adjective from 1905; period piece attested from 1911.
1640s, from French périodique (14c.), from Latin periodicus, from periodus (see period).
Periodic 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).