coin is a small, flat, (usually, depending on the or value) round piece of  or plastic used primarily as a medium of exchange or legal tender. They are standardized in weight, and produced in large quantities at a mint in order to facilitate . They are most often issued by a government. often have images, numerals, or text on them. Obverse and its opposite, , refer to the two flat faces of and medals. In this usage, obverse means the front face of the and  means the back face. The obverse of a coin is commonly called heads, because it often depicts the head of a prominent , and the  tails.

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