A Person Between The Ages Of Eighty And Ninety Is Called an Octogenarian.
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Teen.
tricenarian
A person Aged 90 to 99 years called a Nonagenarian.
A person between the ages of 40 and 49 is a quadragenarian.
old
There isn't a particular name for someone between in 50-60 but someone over 60 is usually called an OAP (Old Aged Person).
Teen.
tricenarian
A person Aged 90 to 99 years called a Nonagenarian.
A person between the ages of 40 and 49 is a quadragenarian.
A person age 60-69 is a sexagenarian, taken from the Latin for "six."
A person aged 100 years is commonly referred to as a centenarian.
70 - 79 - septuagenarian80 - 89 - octogenarian100 years old - centenarian
old
A Nonagenarian
Gax
There isn't a particular name for someone between in 50-60 but someone over 60 is usually called an OAP (Old Aged Person).