| siem |
| siemens | (n) engineer who was a brother of Ernst Werner von Siemens and who moved to England (1823-1883), Syn. Karl Wilhelm Siemens, Sir Charles William Siemens |
| siemens | (n) German electrical engineer (1816-1892), Syn. Ernst Werner von Siemens |
| Siemens-Martin process | See |
| Siemens-Martin steel | See |