| German | English |
| A/O-Verfahren | anoxic/oxic-treatment |
| A/O-Verfahren | A/O-treatment |
| 1,2,12,12a-Tetrahydro-2a-isopropenyl-8,9-dimethoxy-1 benzopyrano 3,4-bfuro 2,3-h 1 benzopyran-6 6aaHon | tubatoxin |
| 1,2,12,12a-Tetrahydro-2a-isopropenyl-8,9-dimethoxy-1 benzopyrano 3,4-bfuro 2,3-h 1 benzopyran-6 6aaHon | rotenone |
| As-Staub | arsenic dust |
| C.A.W.Guggisberg | laughing dove (Streptopelia senegalensis) |
| C.M.A. | maximum permitted concentration, MAC |
| C.M.A. | maximum allowable concentration |
