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Era
An era is a span of time defined for the purposes of chronology or historiography, as in the regnal eras in the history of a given monarchy, a calendar era used for a given calendar, or the geological eras defined for the history of Earth.
Comparable terms are epoch, age, period, saeculum, aeon (Greek aion) and Sanskrit yuga.
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Era (noun)
A time period of indeterminate length, generally more than one year.
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Era (noun)
A unit of time, smaller than eons and greater than periods.
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Period (noun)
A length of time. from 17th c.
“There was a period of confusion following the announcement.”
“You’ll be on probation for a six-month period.”
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Period (noun)
A period of time in history seen as a single coherent entity; an epoch, era. from 16th c.
“Food rationing continued in the post-war period.”
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Period (noun)
The punctuation mark “.” (indicating the ending of a sentence or marking an abbreviation).
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Period (noun)
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. from 17th c.
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Period (noun)
Female menstruation. from 18th c.
“When she is on her period, she prefers not to go swimming.”
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Period (noun)
A section of an artist’s, writer’s (etc.) career distinguished by a given quality, preoccupation etc. from 19th c.
“This is one of the last paintings Picasso created during his Blue Period.”
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Period (noun)
Each of the divisions into which a school day is split, allocated to a given subject or activity. from 19th c.
“I have math class in second period.”
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Period (noun)
Each of the intervals into which various sporting events are divided. from 19th c.
“Gretzky scored in the last minute of the second period.”
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Period (noun)
The length of time for a disease to run its course. 15th-19th c.
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Period (noun)
An end or conclusion; the final point of a process etc. from 16th c.
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Period (noun)
A complete sentence, especially one expressing a single thought or making a balanced, rhythmic whole. from 16th c.
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Period (noun)
A specific moment during a given process; a point, a stage. 17th-19th c.
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Period (noun)
A row in the periodic table of the elements. from 19th c.
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Period (noun)
A Appendix: Geologic timescale.
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Period (noun)
A Drosophila gene, the gene product of which is involved in regulation of the circadian rhythm.
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Period (noun)
Two antecedent and a consequent phrase).
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Period (noun)
The length of an interval over which a periodic function, periodic sequence or repeating decimal repeats; often the least such length.
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Period (noun)
End point, conclusion.
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Period (adjective)
Designating anything from a given historical era.
“a period car”
“a period TV commercial”
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Period (adjective)
Evoking, or appropriate for, a particular historical period, especially through the use of elaborate costumes and scenery.
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Period (interjection)
That’s final; that’s the end of the matter (analogous to a period ending a sentence).
“I know you don’t want to go to the dentist but your teeth need to be checked, period!”
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Period (verb)
To come to a period; to conclude.
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Period (verb)
To put an end to.