Definition:Radical


 * In field theory:
 * Definition:Radical Extension
 * In linear algebra:
 * Definition:Radical of Bilinear Form
 * In number theory:
 * Definition:Radical of Integer
 * In ring theory:
 * Definition:Jacobson Radical
 * Definition:Nilradical of Ring
 * Definition:Radical of Ideal of Ring
 * Definition:Radical Ideal of Ring
 * Definition:Radical of Subset of Ring
 * In the context of Lie algebras:
 * Definition:Radical of Lie Algebra
 * Definition:Nilradical of Lie Algebra

Also see

 * Definition:Root