Venereal disease

Venereal disease. A disease that is contracted and transmitted by sexual contact, caused by microorganisms that survive on the skin or mucus membranes, or that are transmitted via semen, vaginal secretions, or blood during intercourse.
Because the genital areas provide a moist, warm environment that is especially conducive to the proliferation of bacteria, viruses, and yeasts, a great many diseases can be transmitted this way. They include AIDS, chlamydia, genital warts, gonorrhea, syphilis, yeast infections, and some forms of hepatitis.

Sexually transmitted diseases (STDs) are infections that are transmitted during any type of sexual exposure, including intercourse (vaginal or anal), oral sex. a contagious Venereal disease (as gonorrhea or syphilis) that is typically acquired in sexual intercourse. A sexually transmitted disease (STD), also known as sexually transmitted infection (STI) or venereal disease (VD), is an illness that has a significant probability.
Also known as a morbus venereus or sexually transmitted disease (STD).
( From medterms.com about Venereal disease )