Its called a century! century means 100 years and decade means 10 years
A decade.
a dot
A period of 100 years is conveyed by the single word century.
History
The sengoku period lasted for about 450 years
It has no individual name
sevennenium
generation
100 years is a "century."
term millennium
A decade.
A period of 100 years is called a century. For example, the 20th century refers to the years from 1901 to 2000. Additionally, a period of 1,000 years is referred to as a millennium.
That's called a millenium.
A period of 25 years is called a "quarter century." This term is often used to refer to significant milestones or anniversaries that occur every 25 years.
People often call this an Ice Age. The last glacial period began about 100,000 years ago and lasted until 25,000 years ago.
A period of 120 years is commonly referred to as a "century and a score," where a "score" represents 20 years. However, it can also be simply described as a "one hundred and twenty-year period." In some contexts, it might be referred to as a "century and two decades."
If you're in the first 1-2 years of your period, it's normal. If not, call a doctor.