A person's age is, as you must know, the length of time they have been alive. The age of anything else is the length of time it has existed.
If the word is used with an article, as in "It's been an age since I saw you last" or "He lived in The Age of Reason", it means a long period or a long time.
The age of absolute
definition of neoclassecal age
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Something that is suitable for a particular age group.
Dental age is the state of dental maturation, and is determined up to the age of 18.
Age: the period of time the respondents has lived as to the filling of the instruments.
Knobbly, rough, and twisted, especially with age.
60 until you die
One who has attained legal age.
A person under the age of 18.
the average age a person will live up to
There is no specific age definition. Roughly speaking, it is the portion of people that are between puberty and the legal age of majority.