The Mars symbol (♂) is a depiction of a circle with an arrow emerging from it, pointing at an angle to the upper right. In old manuscripts, it is usually interpreted as the shield and spear from the war god Mars/Ares. The symbol has the Unicode entry U+2642. It is used in many fields as a representation of things historically associated with the mythological figure. These include:
In science:

• The male sex
• The planet Mars
• The chemical element iron