dobrão

Etymology 1
From.

Noun

 * 1) doubloon former Spanish gold coin
 * 2) a gold coin minted by the Portuguese in the early 18th century
 * 3) a copper coin formerly used in northeastern Brazil
 * 4)   a small piece of hard material (often a coin or pebble) pressed against the string of a berimbau in order to change its pitch and timbre