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sex-linkage in genetics, an association between certain inherited traits and sex, the genes for those traits being carried on one of the sex chromosomes.
sex-linked of a gene or genetic trait, carried on the chromosome that determines gender.
sexology the scientific study of human sexual practices or behavior.
sexploitation (informal) the use of explicit sexual details or scenes, as in a film, to attract a larger audience.
sex symbol a notable person, often in films, television, or the like, who is considered to represent sexual desirability.
sext (sometimes cap.) the fourth of the seven canonical hours, or the religious service held at this time.
sextant an instrument used for navigating according to the positions of the stars.
sextet a group of six, esp. six musicians playing or singing together. [2 definitions]
sextile the position or aspect of two celestial bodies that are sixty degrees apart.
sextillion the number represented by the Arabic numeral 1021. [2 definitions]
sexton a church official who looks after church property and in some cases rings the bells and buries the dead.
sextuple having six parts; sixfold. [4 definitions]
sextuplet one of six children delivered at one birth. [2 definitions]
sexual of or pertaining to sex or the sex organs. [3 definitions]
sexual harassment the repeated making of unwanted and unsolicited sexual remarks, behaviors, or propositions, especially on the part of one in a position of authority and toward a person of lower status within the same organization, often a workplace.
sexual intercourse the act of inserting the penis into the vagina, esp. when the ejaculation of semen occurs; coitus; copulation.
sexuality the fact of being male or female; sexual differentiation. [3 definitions]
sex up to stimulate sexually. [2 definitions]
sexy of a person, sexually attractive or exciting. [2 definitions]
Seychelles an island country in the Indian Ocean, northeast of Madagascar.
Seyfert galaxy any of numerous spiral galaxies that have a small bright nucleus and emit light and radio waves of variable intensity.