period, in grammar

period: see punctuation punctuation [Lat.,=point], the use of special signs in writing to clarify how words are used; the term also refers to the signs themselves. In every language, besides the sounds of the words that are strung together there are other features, such as tone, accent, and
..... Click the link for more information. .

period, in physics

period, in physics: see harmonic motion harmonic motion, regular vibration in which the acceleration of the vibrating object is directly proportional to the displacement of the object from its equilibrium position but oppositely directed.
..... Click the link for more information. ; wave wave, in physics, the transfer of energy by the regular vibration, or oscillatory motion, either of some material medium or by the variation in magnitude of the field vectors of an electromagnetic field (see electromagnetic radiation).
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period, in geologic time

period, unit of time on the geologic timescale geologic timescale, a chronological scale of earth's history used to measure the relative or absolute age of any part of geologic time. Of the numerous timescales, the most common is based on geologic time units, which divide time into eras, periods, and epochs.
..... Click the link for more information. . Periods are shorter than an era and longer than an epoch. Periods are of variable length, generally lasting tens of millions of years, with characteristic fossils found preserved in the sediments deposited during the period. It is also used to designate a characteristic of geologic time, such as the glacial period.

period

In geology, the basic unit of the geologic time scale. During these spans of time, specific systems of rocks were formed. Originally, the method for defining the sequence of periods was relative; it was based on stratigraphy and paleontology. Carbon-14 dating and similar methods are now used to determine absolute ages for various periods.

period

1. a nontechnical name for an occurrence of menstruation

2. Geology a unit of geological time during which a system of rocks is formed

3. a division of time, esp of the academic day

4. Physics Maths

a. the time taken to complete one cycle of a regularly recurring phenomenon; the reciprocal of frequency.

b. an interval in which the values of a periodic function follow a certain pattern that is duplicated over successive intervals

5. Astronomy

a. the time required by a body to make one complete rotation on its axis

b. the time interval between two successive maxima or minima of light variation of a variable star

6. Chem one of the horizontal rows of elements in the periodic table. Each period starts with an alkali metal and ends with a rare gas

7. a complete sentence, esp a complex one with several clauses

8. Music a passage or division of a piece of music, usually consisting of two or more contrasting or complementary musical phrases and ending on a cadence

9. (in classical prosody) a unit consisting of two or more cola

period [′pir·ē·əd]

(astronomy)

The average time interval for a variable star to complete a cycle of its variations.

(chemistry)

A family of elements with consecutive atomic numbers in the periodic table and with closely related properties; for example, chromium through copper.

(geology)

A unit of geologic time constituting a subdivision of an era; the fundamental unit of the standard geologic time scale.

(mathematics)

A numberTsuch that ƒ(x+T) = ƒ(x) for allx, where ƒ(x) is a specified function of a real or complex variable.

The period of an elementaof a groupGis the smallest positive integernsuch thataⁿis the identity element; if there is no such integer,ais said to be of infinite period.

(nucleonics)

The time required for exponentially rising or falling neutron flux in a nuclear reactor to change by a factor ofe(2.71828).

(physics)

The duration of a single repetition of a cyclic phenomenon.

Period

in music, a structural unit that expresses a complete or relatively complete musical idea. Usually, a period consists of two parts (phrases), each made up of four or eight measures that differ in their cadences (a half cadence in the first phrase and a perfect cadence in the second).

Period

(postroenie), in music, a term that is applicable to any section of a musical form that is structurally distinct from adjacent sections. Usually the term is applied to sections intervening between the main elements of a musical form—for example, sections larger than a phrase but smaller than a sentence. Often, a period is designated by the number of measures it includes (two-measure, four-measure and seven-measure periods, for example). The point of demarcation, or boundary between periods, is called a caesura. Usually the larger the periods, the more important is the caesura dividing them.

Period

a punctuation mark that indicates the end of a declarative sentence. When used in such abbreviations as “i.e., ” the period is not a punctuation mark.

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Period (redirected from puts a period)

period, in grammar

period, in physics

period, in geologic time

period

Period
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