Noun

(centuries)

A period of 100 consecutive years; often specifically'' a numbered period with conventional start and end dates, e.g., the ''twentieth century'', which stretches from (''strictly'') 1901 through 2000, or (''informally'') 1900 through 1999. The ''first century AD was from 1 to 100; a yearhundred.

* {{quote-book, year=1963, author=(Margery Allingham)

, title=(The China Governess), chapter=Foreword citation , passage=He stood transfixed before the unaccustomed view of London at night time, a vast panorama which reminded him […] of some wood engravings far off and magical, in a printshop in his childhood. They dated from the previous century and were coarsely printed on tinted paper, with tinsel outlining the design.}}

* {{quote-magazine, date=2013-07-20, volume=408, issue=8845, magazine=(The Economist)

, title= The attack of the MOOCs , passage=Since the launch early last year of […] two Silicon Valley start-ups offering free education through MOOCs, massive open online courses, the ivory towers of academia have been shaken to their foundations. University brands built in some cases over centuries have been forced to contemplate the possibility that information technology will rapidly make their existing business model obsolete.}}

A unit in ancient Roman army, originally of 100 army soldiers as part of a cohort, later of more varied sizes (but typically containing 60 to 70 or 80) soldiers or other men (guards, police, firemen), commanded by a centurion.

A political division of ancient Rome, meeting in the Centuriate Assembly.

(archaic)  A hundred things; a hundred.

*, II.4.2.i:

'tis the subject of whole books: I might cite a century of authors pro'' and ''con .

(cricket)  A hundred runs scored either by a single player in one innings, or by two players in a partnership.

(cycling)  A ride 100 kilometres in length.

(US, informal)  A banknote in the denomination of one hundred dollars.

Noun

(en noun)

A series or group of ten things.

a decade of soldiers

A period of ten years.

*

The repeated exposure, over decades , to most taxa here treated has resulted in repeated modifications of both diagnoses and discussions, as initial ideas of the various taxa underwent—often repeated—conceptual modification.

* {{quote-magazine

, year=1979 , date=December , title=Museums , magazine=Texas Monthly , volume=7 , issue=12 , page=22 citation , passage=Thru May: 1920s — The Decade That Roared. New exhibition portraying historical events and everyday life during the Roaring Twenties.}}

* {{quote-magazine, date=2013-03

, author=David S. Senchina , title=Athletics and Herbal Supplements , volume=101, issue=2, page=134 , magazine=(American Scientist) citation , passage=Athletes' use of herbal supplements has skyrocketed in the past two decades .}}

* 2002 , , The Great Nation , Penguin 2003, p. 481:

The year was divided up into twelve months renamed after the seasons [...]; each month comprised three ‘decades ’ of ten days – with the décadi replacing Sundays as a day of rest; and each day was reconsecrated to a natural product or farming tool or technique.

(Roman Catholicism) A series of ten Hail Marys in the rosary.

(physics, engineering) The interval between any two quantities having the ratio 10 to 1.

There are decades between 1.8 and 18, between 25 and 250 and between 0.03 and 0.003.