from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The phenomenon of absorption of certain frequencies of radio and microwave radiation by atoms placed in a magnetic field. The pattern of absorption reveals molecular structure.
from the GNU version of the Collaborative International Dictionary of English
- n. A phenomenon resulting from quantization in the magnetic field of electrons or atoms or molecules or nuclei exposed to an external magnetic field, by which a narrow frequency band of radio waves may be absorbed and re-emitted by the object.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. resonance of electrons or atoms or molecules or nuclei to radiation frequencies as a result of space quantization in a magnetic field
Sorry, no etymologies found.
Take a 2009 piece about advances in functional magnetic resonance imaging that ran in the New York Times–owned International Herald Tribune.
Player-turned-broadcaster Ron Santo: “In my day, we didn’t have these fancy training aids, like magnetic resonance imaging.”
In the 1970s and '80s, jazzy futuristic tools like positron-emission tomography, magnetic resonance imaging, and single photon-emission computed tomography allowed researchers to analyze the living brain in action.