algebra

Elementary algebra: A system for representing and manipulating unknown quantities (variables) in equations

• Algebra is my favorite subject.

  Tatoeba · CK · CC BY 2.0 FR

• Algebra is a branch of mathematics.

  Tatoeba · CK · CC BY 2.0 FR

Abstract algebra: A broad field of study in modern mathematics (often mentioned alongside analysis) loosely characterized by its concern for abstraction and symmetry, dealing with the behavior, classification, and application of a large class of objects (called algebraic structures) and the maps between them (called, most generally, morphisms)rare

Any of several objects of study in Algebra; A universal algebrarare

Any of several objects of study in Algebra; 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 multiplicationrare

A collection of subsets of a given set, such that this collection contains the empty set, and the collection is closed under unions and complements (and thereby also under intersections and differences)rare

A system or process (especially one that is complex or convoluted) that substitutes one thing for another, or uses signs or symbols to represent concepts or ideasrare

The surgical treatment of a dislocated or fractured bone. Also (countable): a dislocation or fracturerare