(mathematics) A complex number which, when raised to the power of n, yields the radicand of its nth degree radical, and which has the greatest real part among all such numbers, and positive imaginary part in case of equality of the real parts.

The official name of Liechtenstein.

(mathematics) An ultrafilter such that every set belonging to it is the superset of some fixed singleton set.

The young male protagonist of a pantomime, traditionally played by a female.

plural of principal boy

Synonym of central city (“the main city of a metropolitan area; particularly one containing multiple cities”). / Used other than figuratively or idiomatically: see principal, city.

plural of principal city

Official name of Andorra.

(cinematography) The phase of film production during which the film is actually shot, as distinct from pre-production and post-production.

The official name of Monaco.