[tom-bak] 
| an alloy, used to imitate gold, containing from 70 to 92 percent copper with zinc and sometimes tin and other materials forming the remainder. |
| tom·bac also tam·bac or tam·bak (tŏm'bāk) n. An alloy of copper with zinc and sometimes other metals, used in making inexpensive jewelry. [French, from Dutch tombak, from Malay tembaga.] |