Real Dictionary

Bohr theory in American English
a theory, proposed by Niels Bohr in 1913, stating that electrons revolve in definite orbits around a nucleus, and that radiation is absorbed or emitted only when an electron is transferred from one orbit to another
noun: a theory of atomic structure in which the hydrogen atom (Bohr atom) is assumed to consist of a proton as nucleus, with a single electron moving in distinct circular orbits around it, each orbit corresponding to a specific quantized energy state: the theor

Bohr theory in British English
noun: a theory of atomic structure that explains the spectrum of hydrogen atoms. It assumes that the electron orbiting around the nucleus can exist only in certain energy states, a jump from one state to another being accompanied by the emission or absorption o