Noun

(en noun)

A time period of indeterminate length, generally more than one year.

* {{quote-book, year=1963, author=(Margery Allingham), title=(The China Governess)

, chapter=6 citation , passage=Even in an era when individuality in dress is a cult, his clothes were noticeable. He was wearing a hard hat of the low round kind favoured by hunting men, and with it a black duffle-coat lined with white.}}

* {{quote-magazine, date=2012-01

, author=Philip E. Mirowski , title=Harms to Health from the Pursuit of Profits , volume=100, issue=1, page=87 , magazine= citation , passage=In an era when political leaders promise deliverance from decline through America’s purported preeminence in scientific research, the news that science is in deep trouble in the United States has been as unwelcome as a diagnosis of leukemia following the loss of health insurance.}}

(geology) A unit of time, smaller than .