It's a shorter way of saying "menstrual period" as opposed to other kinds of periods, such as orbital periods, periods of time, etc. The etymology of the word is something along the lines of "Interval, season, time, circuit" etc.
A period of 100 years is called a century.
A period of one year can be called a year, or astronomically speaking, a revolution.
A period of 10 years is called a decade.
A period of ten years is a decade.
Such is called the period of the wave. The period is the reciprocal of the frequency.
The horizontal rows of the periodic table are called Periods and the vertical rows are called groups.
The period after the fall of Rome in the west is called the Dark Ages.The period after the fall of Rome in the west is called the Dark Ages.The period after the fall of Rome in the west is called the Dark Ages.The period after the fall of Rome in the west is called the Dark Ages.The period after the fall of Rome in the west is called the Dark Ages.The period after the fall of Rome in the west is called the Dark Ages.The period after the fall of Rome in the west is called the Dark Ages.The period after the fall of Rome in the west is called the Dark Ages.The period after the fall of Rome in the west is called the Dark Ages.
period
The gestation period of a goose is called the incubation period. After the incubation period, if the egg is fertilized, a chick will hatch.
A Period of ten years is called a decade.
It was called the Jacobean period.
a period of 30 days called
A period of 100 years is called a century.
period
Do you mean what period was Johann Bach in? He was in the Baroque period. 1600 - 1750
It's called the gestation period.
A period of 75 years is called a "septuagenary."