esr meaning and definition

ESR noun

Definition of ESR (noun)

1. 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
   • synonyms: erythrocyte sedimentation rate, sed rate, sedimentation rate
2. microwave spectroscopy in which there is resonant absorption of radiation by a paramagnet
   • synonyms: electron paramagnetic resonance, electron spin resonance