Comparable terms are epoch, age, period, saeculum, aeon (Greek aion) and Sanskrit yuga.
The word has been in use in English since 1615, and is derived from Late Latin aera "an era or epoch from which time is reckoned," probably identical to Latin æra "counters used for calculation," plural of æs "brass, money".
These statutory rules have on the whole remained unchanged but have been somewhat modified in application.
The Latin word use in chronology seems to have begun in 5th century Visigothic Spain, where it appears in the History of Isidore of Seville, and in later texts.
The Spanish era is calculated from 38 BC, perhaps because of a tax (cfr.
Two prizes in the same field—i.e., the prize withheld from the previous year and the current year’s prize—can thus be awarded in one year.
If a prize is declined or not accepted before a set date, the prize money goes back into the funds.
In some cases, the refuser later explained the real reason behind the refusal and was granted the Nobel gold medal and the diploma—but not the money, which invariably reverts to the funds after a certain period of time.
Prizes are withheld or not awarded when no worthy candidate in the meaning of Nobel’s will can be found or when the world situation prevents the gathering of information required to reach a decision, as happened during World Wars I and II.For periods in the history of the universe, the term "epoch" is typically preferred, but "era" is used e.g. Calendar eras count the years since a particular date (epoch), often one with religious significance.Anno mundi ("year of the world") refers to a group of calendar eras based on a calculation of the age of the world, assuming it was created as described in the Book of Genesis.Each Nobel Prize consists of a gold medal, a diploma bearing a citation, and a sum of money, the amount of which depends on the income of the Nobel Foundation.A Nobel Prize is either given entirely to one person, divided equally between two persons, or shared by three persons.If Wiktionary does not have the definition yet, consider moving the whole article to Wiktionary by replacing this tag with the template .