| Noun | 1. | Tc - a crystalline metallic element not found in nature; occurs as one of the fission products of uranium Synonyms: atomic number 43, technetium |
| 2. | TC - a permanent council of the United Nations that commissions a country (or countries) to undertake the administration of a territory Synonyms: Trusteeship Council |
| (networking) | tc - The country code for the Turks and Caicos Islands. |