(algebra, commutative algebra, ring theory) An ideal I within a ring R that is its own radical (i.e., for any r ∈ R, if rⁿ ∈ I for some positive integer n, then r ∈ I).

plural of radius vector

The adoption and promotion of radical political causes by celebrities, socialites, and high society.

(historical) A member of the Republican Party or the Radical Republican Party in the United States, who supported Reconstruction as the rapid full emancipation of African Americans and continuation of the martial law regime in former Confederate states.

The complete surgical removal of the prostate gland.

The complete surgical removal of the breast.

The complete surgical removal of the uterus.

To irradiate with X-rays.

(espionage) Radio broadcasting propaganda whose source and motivation are covert.

(espionage) Radio broadcasting propaganda whose source and motivation are apparent.