Definition:Algebra (Mathematical Branch)

Definition
Algebra is the branch of mathematics which studies the techniques of manipulation of objects and expressions.

Linguistic Note
The word algebra originates from the Arabic word al-ğabr, meaning balancing, reduction or restoration.

It originates from the name of a book, circa 825 C.E., by :
 * Al-Kitāb al-muḫtaṣar fī ḥisāb al-ğabr wa-l-muqābala (The Compendious Book on Calculation by Completion and Balancing)