Bohr theory

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An early model of atomic structure in which electrons travel around the nucleus in a number of discrete stable orbits determined by quantum conditions.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun (physics) a theory of atomic structure that combined Rutherford's model with the quantum theory; electrons orbiting a nucleus can only be in certain stationary energy states and light is emitted when electrons jump from one energy state to another