1) Former coin of Portugal 2) Gold coin 3) Old gold coin 
A moidore is a Portuguese gold coin, minted from 1640 to 1732. The moidore was current in western Europe and the West Indies, particularly Barbados, for a long period after it ceased to be struck. It was the principal coin current in Ireland at the beginning of the 18th century, and spread to the west of England. ==Origin== The name moidore is der...
• (n.) A gold coin of Portugal, valued at about 27s. sterling.
Moi'dore noun [ Portuguese moeda d'ouro , lit., coin of gold. Confer Money , and Aureate .] A gold coin of Portugal, valued at about 27s. sterling. 
a former gold coin of Portugal and Brazil.