| RE | respiratory exchange ratio |
|---|---|
| RER | renal excretion rate; respiratory exchange ratio; rough endoplasmic reticulum |
| SCE | secretory carcinoma of the endometrium; sister chromatid exchange; split hand-cleft lip/palate ectod... |
| SCER | sister chromatid exchange rate |
| SSIE | Smithsonian Science Information Exchange |