(differential geometry) A type of geometry (mathematical object representing a space and its spatial relationships); a homogeneous space X together with a symmetry group which represents the group action on X of some Lie group;

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

(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.

plural of Kaluza-Klein theory

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

mandibulofacial dysostosis: a syndrome that causes various physical deformities

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

Of or pertaining to Christian Felix Klein (1849–1925), German mathematician.

(mineralogy) A hexagonal-dihexagonal dipyramidal mineral containing chlorine, hydrogen, mercury, nitrogen, oxygen, and sulfur.

plural of Kleinschmidt still