(mathematics) The closed manifold obtained by identifying the boundary components of the annulus so that the resultant surface is nonorientable.

A mountain pass, a tourist centre and railway hub in Bern canton, Switzerland.

plural of Kaluza-Klein theory

(physics) A model (not believed to be literally true) developed by physicists Theodor Kaluza and Oskar Klein that attempted to combine gravity and electromagnetism by adding a fifth dimension to our four-dimensional spacetime.

(art) An intense deep blue hue achieved by means of ultramarine pigment and a binder.

mandibulofacial dysostosis: a syndrome that causes various physical deformities

A neurological disorder characterized by recurring periods of excessive sleeping and eating.

A surname.

plural of Kleinberg