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either the male or female division of a species, especially as differentiated with reference to the reproductive functions.
the sum of the structural and functional differences by which the male and female are distinguished, or the phenomena or behavior dependent on these differences.
the instinct or attraction drawing one sex toward another, or its manifestation in life and conduct.
verb (used with object)
to ascertain the sex of, especially of newly-hatched chicks.
Verb phrases
sex up, Informal.

to arouse sexually:
The only intent of that show was to sex up the audience.
to increase the appeal of; to make more interesting, attractive, or exciting:
We’ve decided to sex up the movie with some battle scenes.

to have sex, to engage in sexual intercourse.
the sum of the characteristics that distinguish organisms on the basis of their reproductive function
either of the two categories, male or female, into which organisms are placed on this basis
short for sexual intercourse
feelings or behaviour resulting from the urge to gratify the sexual instinct
sexual matters in general
of or concerning sexual matters: sex education, sex hygiene
based on or arising from the difference between the sexes: sex discrimination
(transitive) to ascertain the sex of

sex (sěks)

The property or quality by which organisms are classified as female or male on the basis of their reproductive organs and functions.

Either of the two divisions, designated female and male, of this classification.

Females or males considered as a group.

The condition or character of being female or male; the physiological, functional, and psychological differences that distinguish the female and the male.

The sexual urge or instinct as it manifests itself in behavior.

Sexual intercourse.

Either of two divisions, male and female, into which most sexually reproducing organisms are grouped. Sex is usually determined by anatomy, the makeup of the sex chromosomes, and the type and amount of hormones produced. When the sex of an organism is determined by the sex chromosomes, males and females are generally produced in equal numbers. In other organisms, such as bees and wasps, in which females develop from fertilized eggs and males develop from unfertilized eggs, distribution of the sexes is unequal.

Our Living Language : Thanks to high school biology, we are accustomed to thinking of the sex of an organism as being determined by the chromosomes, notably the sex chromosome in humans (designated X or Y). But this is not the whole story, and it applies universally only to mammals and birds. In other animals sex is often determined by environmental factors and can be a variable phenomenon. In a species of slipper limpet (Crepidula fornicata), a kind of mollusk, all individuals begin life as females. Clinging to rocks and to each other, they form piles. The limpet on top of the pile changes into a male. If another limpet attaches itself on top of the male limpet, the newcomer becomes male, and the male limpet beneath it reverts to being female. These slipper limpets show the evolutionarily advanced feature of internal fertilization, and the male on top extends his reproductive organ down the pile of females below him to fertilize their eggs. For some fish, the number of males in the population determines the sex of the fish. If there are not enough males, some females become males. In these examples, the same animal can make fertile eggs and fertile sperm at different times in its life. These animals are not hermaphrodites, like some worms, but literally change sex. Some animals have only one sex. For instance, some species of lizards reproduce only by parthenogenesis—that is, their unfertilized eggs grow into adults, and these species no longer have males. Sometimes the external temperature determines the sex of an animal during its early development. If the eggs of the American alligator (Alligator mississippiensis) are incubated at above 34 degrees Celsius (93° F), all of the offspring become males. If they are incubated below 30 degrees Celsius (86° F), they become females. The midrange of temperatures results in both male and female offspring.

Sextans (constellation)
see: fair sex


Read Also:

  • Sexist

    adjective 1. relating to, involving, or fostering sexism, or attitudes and behavior toward someone based on the person’s gender: a sexist remark; sexist advertising. noun 2. a person who has sexist attitudes or behaves in a sexist manner.

  • Sexivalent

    adjective, Chemistry. 1. hexavalent. adjective, Chemistry. 1. hexavalent. adjective 1. (chem) another word for hexavalent

  • Sex-kitten

    noun, Informal. 1. a young woman who is sexy and coquettish. sex kitten

  • Sexless

    adjective 1. having or seeming to have no sex; neuter. 2. having or seeming to have no sexual desires. 3. having no sex appeal; sexually uninteresting. adjective 1. having or showing no sexual differentiation 2. having no sexual desires 3. sexually unattractive

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