Algebras

noun

1. A system for computation using letters or other symbols to represent numbers, with rules for manipulating these symbols.
2. The surgical treatment of a dislocated or fractured bone. Also : a dislocation or fracture.
3. The study of algebraic structures.
4. A universal algebra.
5. An algebraic structure consisting of a module over a commutative ring (or a vector space over a field) along with an additional binary operation that is bilinear over module (or vector) addition and scalar multiplication.