(astronomy) Any astronomical object of known absolute magnitude. Its distance can then be calculated from its apparent magnitude.

An agreed method of measuring time; a specification or standard of either the rate at which time passes, or of points in time, or of both.

(rail transport) A track gauge of 56.5 inches (1435 mm).

Alternative spelling of stand-alone

Alternative spelling of stand-alone

A bird of paradise (Semioptera wallacii) which has two long special feathers standing erect on each wing.

(topology) The topology of the real number system generated by a basis which consists of all open balls (in the real number system), which are defined in terms of the one-dimensional Euclidean metric.

plural of standard-wing

(particle physics) A theory about the electromagnetic, weak, and strong nuclear interactions that mediate the dynamics of the known subatomic particles.

The form of the German language used for publishing, broadcasting and writing in Switzerland and Liechtenstein, as distinguished from the Swiss German language used in speech.