Question: What Is A Million Years Called?

What is 10 000 years called?

millenniumA decade means ten years, a century means a hundred, and millennium means a thousand.

Think: a decade of marriage, the new millennium.

In Latin, in the Romance languages, and in the metric system, mille refers to a thousand..

What comes after a millennia?

Once beyond millennia we use numbers of years such as “One Hundred-Thousand Years”, or some use metric prefixes to ‘annum’ (for example megaannum as referenced in Wikipedia) but they are basically the same idea.

What is the name for 500 years?

Latin-derived numerical namesAnniversaryLatin-derived termOther terms350 yearsSesquarcentennialSemiseptcentennial400 yearsQuadricentennialQuadricentenary / Quatercentenary500 yearsQuincentenaryQuincentennial54 more rows

How long is a eon?

one billion yearsLess formally, eon often refers to a span of one billion years.

How long is a era?

An era in geology is a time of several hundred million years. It describes a long series of rock strata which geologists decide should be given a name. An example is the Mesozoic era, when dinosaurs lived on the Earth. An era is made up of periods, and several eras make up an eon.

What is a billion years called?

It is sometimes abbreviated Gy, Ga (“giga-annum”), Byr and variants. … The abbreviations Gya or bya are for “billion years ago”, i.e. billion years before present. The terms are used in geology, paleontology, geophysics, astronomy, and physical cosmology.

What do you call a period of 50 years?

A period of fifty years is called semi-centennial, Alternatively, if a period of ten years is called a decade, then fifty years could be called five decades, It is also half a century.

What is another word for 5 years?

Happening once every five years. Happening every five years. Lasting for five years.

What is a period of 30 years called?

• A period of 30 years is equal to 3 decades. Because, 10 years = 1 decade.

What is a 12 year period called?

Duodecennial word can be used as alternatively for a gap once in 12 years .

What is a period of 20 years called?

History and Etymology for vicennial Late Latin vicennium period of 20 years, from Latin vicies 20 times + annus year; akin to Latin viginti twenty — more at vigesimal, annual.

What do you call a 25 year old?

The term “quadrans” (like “quadrant”) means a fourth or a quarter (it was the name of a Roman coin), so a quadranscentennial is a fourth of a centennial — i.e., 25 years.