ESR
Definition
- Noun (Acronym):
- Electron Spin Resonance: A technique in microwave spectroscopy where a paramagnetic substance resonantly absorbs radiation when placed in a magnetic field. It is used to study materials with unpaired electrons.
- Erythrocyte Sedimentation Rate: A common medical test that measures the rate at which red blood cells settle at the bottom of a test tube. A faster-than-normal rate can be a non-specific indicator of inflammation or disease in the body.
Usage Examples
- Electron Spin Resonance (ESR):
- The researcher used ESR to study the free radicals in the sample.
- ESR spectroscopy is a powerful tool for investigating paramagnetic centers.
- Erythrocyte Sedimentation Rate (ESR):
- The doctor ordered an ESR test to check for signs of inflammation.
- A high ESR often suggests an active inflammatory process.
Advanced Usage
- The meaning of ESR is entirely context-dependent. In a physics or chemistry laboratory, it almost always refers to Electron Spin Resonance. In a medical or clinical context, it refers to the Erythrocyte Sedimentation Rate.
- It is often used attributively (as a noun modifier) in compound terms like ESR spectroscopy (physics) or ESR test (medicine).
Variants and Related Words
- ESR is an initialism, with each letter pronounced separately (E-S-R).
- Synonym for Electron Spin Resonance: Electron Paramagnetic Resonance (EPR). These terms are often used interchangeably.
- Synonym for Erythrocyte Sedimentation Rate: Sed rate (informal clinical term).
Synonyms
- For Electron Spin Resonance: EPR (Electron Paramagnetic Resonance).
- For Erythrocyte Sedimentation Rate: Sedimentation rate, Sed rate.
Related Phrases
- Elevated ESR: A common medical phrase indicating a test result higher than the normal reference range.
- ESR signal: The specific absorption signal detected in ESR spectroscopy.
Noun
-
microwave spectroscopy in which there is resonant absorption of radiation by a paramagnet
-
the rate at which red blood cells settle out in a tube of blood under standardized conditions; a high rate usually indicates the presence of inflammation
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