| PRR | proton relaxation rate; pulse repetition rate |
|---|---|
| RRR | regular rhythm and rate; renin release rate (or ratio) |
| SER | sebum excretion rate; sensitizer enhancement ratio; sensory evoked response; service; smooth endopla... |
| SR | sarcoplasmic reticulum; saturation recovery; scanning radiometer; screen; secretion rate; sedimentat... |
| TPR | temperature, pulse, and respiration; testosterone production rate; third party reimbursement; total ... |
| lethality rate | <statistics> The proportion of deaths in a population or to a specific number of the population. (18 Nov 1997) |
|---|---|
| lowest achievable emissions rate | (LAER) Used to describe air emissions control technology. A rate of emissions defined by the permitting agency. LEAR sets emission limits for non-attainment areas. (05 Dec 1998) |
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