Sexual /(?)/
Sex·u·al
Sexual
a.
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Of or pertaining to sex, or the sexes; distinguishing sex; peculiar to the distinction and office of male or female; relating to the distinctive genital organs of the sexes; proceeding from, or based upon, sex; as, sexual characteristics; sexual intercourse, connection, or commerce; sexual desire; sexual diseases; sexual generation.
In these cases, therefore, natural selection seems to have acted independently of sexual selection.