The Venus symbol (♀) is a depiction of a circle with a small cross below it. The symbol is historically associated with the Roman goddess Venus or the Greek goddess Aphrodite. It has a Unicode designation of U+2640, and is used in various media to represent things associated in some way with the mythological character, including:
It is also believed by some to represent a hand mirror. The top half of the symbol representing the actual mirror, and the bottom half representing the handle of the mirror.