A surname from Italian.

A surname from Serbo-Croatian.

(chemistry, physics) A molecule, ion or atom that has one or more unpaired electrons, and which is generally highly reactive (and therefore often occurs only as a transient species).

(geometry) A point at which the radical lines of three circles meet. / Pertaining to radical centrism.

(mathematics) The line containing the locus of points from which the segments respectively tangent to two given circles have equal length.

(mathematics) The line containing the locus of points from which the segments respectively tangent to two given circles have equal length.

(chemistry) Any radical that also carries an electric charge; typically, the charge and unpaired electron are associated with the same atom.

(chemistry) A negatively charged radical ion.

(chemistry) A positively charged radical ion.

(chemistry) The uncharged radical H₂N^. formally derived from ammonia by removing a hydrogen atom; and any of its derivatives R₂N^.