Organisms of many species are specialized into male and female varieties, each known as a sex. Sexual reproduction involves the combining and mixing of genetic traits: specialized cells known as gametes combine to form offspring that inherit traits from each parent. Gametes can be identical in form and function, but in many cases an asymmetry has evolved such that two sex-specific types of gametes exist . By definition, male gametes are small, motile, and optimized to transport their genetic information over a distance, while female gametes are large, non-motile and contain the nutrients necessary for the early development of the young organism. Among humans and ...

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  1. Either of the main divisions into which many organisms can be placed according to their reproductive functions or organs.
    What sex is that hamster?
    The abnormality is found in both sexes.
    Slime molds are sometimes erroneously said to have thirteen sexes.
  2. The distinguishing property, quality, or assemblage of properties by which organisms are classified as female or male on the basis of their reproductive organs and functions; the set of properties by which male is distinguished from female.
    The effect of the medication is dependent upon age, sex, and other factors.
    The researchers divided the subjects by sex.
  3. Sexual intercourse; the act of sexual intercourse.
    All you ever think about is sex.
    We had sex in the back seat.
  4. Genitalia; a penis or vagina.
  5. Women; womankind.


  1. To determine the biological sex of an animal.
    It is not easy to sex lizards.
  2. To have sex with.
    The passionate lovers sexed each other every night.
    OK, so I'm sexin' her, right, and all I can think of is this other girl.

The above text is a snippet from Wiktionary: sex
and as such is available under the Creative Commons Attribution/Share-Alike License.

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