esr Meaning, Definition & Usage
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       noun 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
       
       
 erythrocyte sedimentation rate; sedimentation rate; sed rate.
 
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       noun microwave spectroscopy in which there is resonant absorption of radiation by a paramagnet
       
       
 electron paramagnetic resonance; electron spin resonance.