What is era?

Era

An era is a commonly used word for long period of time. When used in science, for example geology, eras denote clearly defined periods of time of arbitrary but well defined length, such as for example the Mesozoic Era from 252 Ma–66 Ma, delimited by a start event and an end event. When used in social history, eras may for example denote a period of some monarch's reign. In colloquial language, eras denote longer spans of time, before and after which the practices or fashions change to a significant degree. When era is extended to a calendar system, it is known as a calendar era. In Sanskrit or Indian culture eras are known as Yugas.

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Famous quotes containing the word era:

    How many a man has dated a new era in his life from the reading of a book! The book exists for us, perchance, that will explain our miracles and reveal new ones. The at present unutterable things we may find somewhere uttered.
    Henry David Thoreau (1817–1862)

    The fantasies inspired by TB in the last century, by cancer now, are responses to a disease thought to be intractable and capricious—that is, a disease not understood—in an era in which medicine’s central premise is that all diseases can be cured.
    Susan Sontag (b. 1933)

    The lover of nature is he whose inward and outward senses are still truly adjusted to each other; who has retained the spirit of infancy even into the era of manhood.
    Ralph Waldo Emerson (1803–1882)