Obverse and reverse

The term obverse and its opposite, reverse, describe the two sides of units of currency and many other kinds of two-sided objects - most often in reference to coins, but also to paper currency, flags (see Flag terminology), medals, drawings, old master prints and other works of art, and printed fabrics. The terms may be interchanged respectively with the more casual, but less precise terms, such as "front" and "back" or, for coins only, "heads" and "tails" also occurs.

In many areas other than numismatics, reverse is used much more commonly than obverse. Front and reverse also may be used together more frequently.

Recto and verso are the equivalent terms for front and back used for the pages of books, especially illuminated manuscripts, and also often for prints and drawings.
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