Mars symbol opposite of Venus symbol
Venus
The Venus symbol, ♀, consists of a circle with a small cross below it. 
It has been interpreted as a depiction of the hand-mirror of the goddess, which may also explain Venus's association with the planetary metal copper, as mirrors in antiquity were made of polished copper (alloy), though this is not certain. In the Greek Oxyrhynchus Papyri 235, the symbols for Venus and Mercury didn't have the cross on the bottom stroke, and Venus still appears without the cross (⚲) in Johannes Kamateros (12th century).
In  botany and biology, the symbol for Venus is used to represent the female sex, alongside the symbol for Mars representing the male sex, following a convention introduced by Linnaeus in the 1750s. Arising from the biological convention, the symbol also came to be used in sociological contexts to represent women or femininity. 
This gendered association of Venus and Mars has been used to pair them heteronormatively, describing women and men stereotypically as being so different that they can be understood as coming from different planets, an understanding popularized in 1992 by the book titled Men Are from Mars, Women Are from Venus.Unicode encodes the symbol as U+2640 ♀ FEMALE SIGN (&female;), in the Miscellaneous Symbols block.Mars
The Mars symbol, ♂, is a depiction of a circle with an arrow emerging from it, pointing at an angle to the upper right in Europe and to the upper left in India. As astrological symbol it represents the planet Mars. It is also the old and obsolete symbol for iron in alchemy. In zoology and botany, it is used to represent the male sex (alongside the astrological symbol for Venus representing the female sex), following a convention introduced by Linnaeus in the 1750s.The symbol dates from at latest the 11th century, at which time it was an arrow across or through a circle, thought to represent the shield and spear of the god Mars; in the medieval form, for example in the 12th-century Compendium of Astrology by Johannes Kamateros, the spear is drawn across the shield. The Greek Oxyrhynchus Papyri show a different symbol, perhaps simply a spear.
antonym contrary reverse inverse complement