tricenarian
Teen.
A person Aged 90 to 99 years called a Nonagenarian.
A person between the ages of 40 and 49 is a quadragenarian.
old
A person aged between 50 and 60 years is often referred to as "middle-aged."
tricenarian
Teen.
A person Aged 90 to 99 years called a Nonagenarian.
A person between the ages of 40 and 49 is a quadragenarian.
A person aged between 60 and 70 years is typically referred to as a senior citizen or someone in their senior years.
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).