It's the term used for the "new" period of Ancient Egyptian history from the 18th to the 20th dynasty
... the period in the history of ancient Egypt
, 15801085 b.c., comprising the 18th to ... Romulus, Makers of History Jacob 
Abbott ... a period of Egyptian history, extending from the 18th to the 20th dynasty 
(?1570?1080 bc) ... What mistaken pronunciation gave this character its name?