Having to do with sexual intercourse or diseases transmitted by it.
Example:
In the 19th century syphilis especially was often fatal, and venereal diseases killed some of the greatest figures of the time.
Venus was the Roman goddess of love, the equivalent of the Greek Aphrodite. Since she governed all aspects of human sensuality and sexuality, she has given her name to the diseases acquired through sexual contact. Most of these venereal diseases have been around for centuries, but only in this century have doctors devised tests to identify them or medicines to cure them. Today the official term is sexually transmitted disease, or STD; but even this name turns out to be ambiguous, since some of these diseases can be contracted in other ways as well.