(mathematics, topology, geometry) Any of a group of characteristic classes associated with complex vector bundles, with applications in physics, string theory, etc.

plural of Chern class

(mathematics) A three-dimensional topological quantum field theory of Schwarz type, with applications in condensed-matter physics and quantum computing.

A partially abandoned city and ghost town in northern Ukraine, known as the site of a nuclear disaster.

(by extension) A major nuclear-energy accident.

A city, the administrative centre of Chernivtsi Oblast, in the Bukovyna region, Ukraine, on the Prut river. / An oblast in southwestern Ukraine.

A port city, the administrative centre of Chernihiv Raion, Chernihiv Oblast, in northern Ukraine, on the Desna River; administrative centre of the raion and the oblast.

plural of chernozem

A fertile black soil containing a very high percentage of humus (3% to 15%) and high percentages of phosphoric acids, phosphorus and ammonia.

plural of Chernobyl