n.
1.second part of the Stone Age beginning about 750,00 to 500,000 years BC and lasting until the end of the last ice age about 8,500 years BC
Idiom of the Day
the exception that proves the rule
an exception to a rule proves that the rule exists
The salesman is very quiet and shy and he is the exception that proves the rule in his company. Everybody else is very talkative.