Tombak has 3 different meanings across 1 category:
Noun
an alloy of copper and zinc (and sometimes arsenic) used to imitate gold in cheap jewelry and for gilding
A type of goblet drum used heavily in Persian music.
A brass alloy also known as red-bronze. Term used where zinc content is below 28%. Usually consists of 84-90 % copper and 16-10% zinc, sometimes including arsenic to mimic gold.