Period vs. Group — What's the Difference?

An interval of time characterized by the occurrence of a certain condition, event, or phenomenon

An assemblage of persons or objects gathered or located together; an aggregation

An interval of time characterized by the prevalence of a specified culture, ideology, or technology

A set of two or more figures that make up a unit or design, as in sculpture.

An interval regarded as a distinct evolutionary or developmental phase

A number of individuals or things considered or classed together because of similarities

(Geology) A unit of time, longer than an epoch and shorter than an era.

(Linguistics) A category of related languages that is less inclusive than a family.

Any of the divisions of the academic day.

A military unit consisting of two or more battalions and a headquarters.

Sports & Games A division of the playing time of a game.

A unit of two or more squadrons in the US Air Force, smaller than a wing.

Physics & Astronomy The time interval between two successive occurrences of a recurrent event or phases of an event; a cycle

Two or more atoms behaving or regarded as behaving as a single chemical unit.

See menstrual period.

A column in the periodic table of the elements.

A point or portion of time at which something is ended; a completion or conclusion.

(Geology) A stratigraphic unit, especially a unit consisting of two or more formations deposited during a single geologic era.

A punctuation mark ( . ) indicating a full stop, placed at the end of declarative sentences and other statements thought to be complete, and after many abbreviations.

(Mathematics) A set, together with a binary associative operation, such that the set is closed under the operation, the set contains an identity element for the operation, and each element of the set has an inverse element with respect to the operation. The integers form a group under the operation of ordinary addition.

The full pause at the end of a spoken sentence.

Of, relating to, constituting, or being a member of a group

A sentence of several carefully balanced clauses in formal writing.

To place or arrange in a group

A metrical unit of quantitative verse consisting of two or more cola.

To belong to or form a group

An analogous unit or division of classical Greek or Latin prose.

A number of things or persons being in some relation to one another.

(Music) A group of two or more phrases within a composition, often made up of 8 or 16 measures and terminating with a cadence.

(group theory) A set with an associative binary operation, under which there exists an identity element, and such that each element has an inverse.

The least interval in the range of the independent variable of a periodic function of a real variable in which all possible values of the dependent variable are assumed.

An effective divisor on a curve.

A group of digits separated by commas in a written number.

A (usually small) group of people who perform music together.

The number of digits that repeat in a repeating decimal. For example, 1/7 = 0.142857142857 ... has a six-digit period.

(astronomy) A small number (up to about fifty) of galaxies that are near each other.

(Chemistry) A sequence of elements arranged in order of increasing atomic number and forming one of the horizontal rows in the periodic table.

(chemistry) A column in the periodic table of chemical elements.

Of, belonging to, or representing a certain historical age or time

(chemistry) A functional group.

Used to emphasize finality, as when expressing a decision or an opinion

(sociology) A subset of a culture or of a society.

A length of time.

(military) An air force formation.

A period of time in history seen as a single coherent entity; an epoch, era.

(geology) A collection of formations or rock strata.

The punctuation mark “.” (indicating the ending of a sentence or marking an abbreviation).

(computing) A number of users with the same rights with respect to accession, modification, and execution of files, computers and peripherals.

(figurative) A decisive end to something; a stop.

An element of an espresso machine from which hot water pours into the portafilter.

The length of time during which the same characteristics of a periodic phenomenon recur, such as the repetition of a wave or the rotation of a planet.

(music) A number of eighth, sixteenth, etc., notes joined at the stems; sometimes rather indefinitely applied to any ornament made up of a few short notes.

(euphemism) Female menstruation; an episode of this.

(sports) A set of teams playing each other in the same division, while not during the same period playing any teams that belong to other sets in the division.

A section of an artist's, writer's (etc.) career distinguished by a given quality, preoccupation etc.

(business) A commercial organization.

Each of the divisions into which a school day is split, allocated to a given subject or activity.

(transitive) To put together to form a group.

Each of the intervals, typically three, of which a game is divided.

(intransitive) To come together to form a group.

One or more additional intervals to decide a tied game, an overtime period.

A cluster, crowd, or throng; an assemblage, either of persons or things, collected without any regular form or arrangement; as, a group of men or of trees; a group of isles.

The length of time for a disease to run its course.

An assemblage of objects in a certain order or relation, or having some resemblance or common characteristic; as, groups of strata.

An end or conclusion; the final point of a process etc.

A variously limited assemblage of animals or plants, having some resemblance, or common characteristics in form or structure. The term has different uses, and may be made to include certain species of a genus, or a whole genus, or certain genera, or even several orders.

(rhetoric) A complete sentence, especially one expressing a single thought or making a balanced, rhythmic whole.

A number of eighth, sixteenth, etc., notes joined at the stems; - sometimes rather indefinitely applied to any ornament made up of a few short notes.

(obsolete) A specific moment during a given process; a point, a stage.

To form a group of; to arrange or combine in a group or in groups, often with reference to mutual relation and the best effect; to form an assemblage of.

(chemistry) A row in the periodic table of the elements.

Any number of entities (members) considered as a unit

(geology) A geochronologic unit of millions to tens of millions of years; a subdivision of an era, and subdivided into epochs.

(chemistry) two or more atoms bound together as a single unit and forming part of a molecule

(genetics) A Drosophila gene, the gene product of which is involved in regulation of the circadian rhythm.

A set that is closed, associative, has an identity element and every element has an inverse

(music) Two phrases (an antecedent and a consequent phrase).

Arrange into a group or groups;

(math) The length of an interval over which a periodic function, periodic sequence or repeating decimal repeats; often the least such length.

Form a group or group together

(archaic) End point, conclusion.

Designating anything from a given historical era. en

Evoking, or appropriate for, a particular historical period, especially through the use of elaborate costumes and scenery.

That's final; that's the end of the matter (analogous to a period ending a sentence); end of story.

To come to a period; to conclude.

To put an end to.

A portion of time as limited and determined by some recurring phenomenon, as by the completion of a revolution of one of the heavenly bodies; a division of time, as a series of years, months, or days, in which something is completed, and ready to recommence and go on in the same order; as, the period of the sun, or the earth, or a comet.

A stated and recurring interval of time; more generally, an interval of time specified or left indefinite; a certain series of years, months, days, or the like; a time; a cycle; an age; an epoch; as, the period of the Roman republic.

One of the great divisions of geological time; as, the Tertiary period; the Glacial period. See the Chart of Geology.

The termination or completion of a revolution, cycle, series of events, single event, or act; hence, a limit; a bound; an end; a conclusion.

A complete sentence, from one full stop to another; esp., a well-proportioned, harmonious sentence.

The punctuation point [.] that marks the end of a complete sentence, or of an abbreviated word.

One of several similar sets of figures or terms usually marked by points or commas placed at regular intervals, as in numeration, in the extraction of roots, and in circulating decimals.

The time of the exacerbation and remission of a disease, or of the paroxysm and intermission.

A complete musical sentence.

To put an end to.

To come to a period; to conclude. [Obs.] "You may period upon this, that," etc.

An amount of time;

One of three periods of play in hockey games

A stage in the history of a culture having a definable place in space and time;

The interval taken to complete one cycle of a regularly repeating phenomenon

The monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause;

A punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations;

A unit of geological time during which a system of rocks formed;

The end or completion of something;