Advertisement
Advertisement
nuclear magnetic resonance
[ noo-klee-er mag-net-ik rez-uh-nuhns, nyoo- ]
noun
- the selective absorption of electromagnetic radiation by an atomic nucleus in the presence of a strong, static, magnetic field: used in research and in medicine to monitor tissue metabolism and to distinguish between normal and abnormal cells. : NMR Compare MRI.
nuclear magnetic resonance
noun
- a technique for determining the magnetic moments of nuclei by subjecting a substance to high-frequency radiation and a large magnetic field. The technique is used as a method of determining structure NMR See also electron spin resonance
nuclear magnetic resonance
- The absorption of electromagnetic energy (typically radio waves) by the nuclei of atoms placed in a strong magnetic field. The nuclei of different atoms absorb unique frequencies of radiation depending on their environment, thus by observing which frequencies are absorbed by a sample placed in a strong magnetic field (and later emitted again, when the magnetic field is removed), it is possible to learn much about the sample's makeup and structure. Nuclear magnetic resonance has no known side effects on the human body, and is therefore used to analyze soft body tissues in magnetic resonance imaging (MRI).
Discover More
Pronunciation Note
Discover More
Word History and Origins
Origin of nuclear magnetic resonance1
Discover More
Example Sentences
The answer lies in the atomic world and its quantum properties, specifically nuclear magnetic resonance—that’s where the “M” and “R” in fMRI come from.
Other methods, with unfriendly names like “nuclear magnetic resonance spectroscopy,” are just as expensive and finicky.
More recently, two other experimental methods—nuclear magnetic resonance and cryogenic electron microscopy—have also been used.
Advertisement
Word of the Day
[tawr-choo-uhs ]
Meaning and examplesStart each day with the Word of the Day in your inbox!
By clicking "Sign Up", you are accepting Dictionary.com Terms & Conditions and Privacy Policies.
Advertisement
Advertisement
Advertisement
Browse