- noun
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A length of time.
There was a period of confusion following the announcement.
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A period of time in history seen as a single coherent entity; an epoch, era.
Food rationing continued in the post-war period.
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The punctuation mark “.” (indicating the ending of a sentence or marking an abbreviation).
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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.
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Female menstruation.
When she is on her period, she prefers not to go swimming.
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A section of an artist's, writer's (etc.) career distinguished by a given quality, preoccupation etc.
This is one of the last paintings Picasso created during his Blue Period.
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Each of the divisions into which a school day is split, allocated to a given subject or activity.
I have math class in second period.
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Each of the intervals into which various sporting events are divided.
Gretzky scored in the last minute of the second period.
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The length of time for a disease to run its course.
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An end or conclusion; the final point of a process etc.
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A complete sentence, especially one expressing a single thought or making a balanced, rhythmic whole.
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A specific moment during a given process; a point, a stage.
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A row in the periodic table of the elements.
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A subdivision of an era, typically lasting from tens to hundreds of millions of years, see Appendix: Geologic timescale.
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A Drosophila gene, the gene product of which is involved in regulation of the circadian rhythm.
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Two phrases (an antecedent and a consequent phrase).
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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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End point, conclusion.
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同義詞 :
dot;
full stop;
full-point;
plain point;
point;
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反義詞 :
frequency;