Darood e Akber

Durood e Akbar is a mar'roof Durood Shareef which is commonly read. It is referred to as Durood e Akbar because it is said that it includes all the Sifaat e Jameela of Huzoor Sallal Laahu Ta'ala Alayhi Wa Aalihi Wa Sallam in Jama'a andaaz. And it is also referred to as Akbar because of its length. The word 'nida or nada' (?