adiabatic approximation(redirected from Molecular Hamiltonian)
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adiabatic approximation[¦ad·ē·ə¦bad·ik ə‚präk·sə′mā·shən]
The approximation that the pressure and density of gas in a star are related by the adiabatic law.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.