| OEL | occupational exposure limit |
|---|---|
| PEL | peritoneal exudate lymphocyte; permissible exposure limit |
| REL | rate of energy loss; recommended exposure limit; resting expiratory level |
| STEL | short-term exposure limit |
| LCL | Levinthal-Coles-Lillie [body]; lower confidence limit; lower control limit; lymphoblastoid cell line... |