venereal

adj. pertaining to sexual intercourse; resulting from sexual intercourse; pertaining or associated with venereal disease; of or pertaining to the genitals

A sexually transmitted disease (STD) is an illness caused by an infectious pathogen that has a significant probability of transmission between humans or animals by means of sexual contact, including vaginal intercourse, oral sex, and anal sex. Increasingly, the term sexually transmitted infection (STI) is used, as it has a broader range of meaning; a person may be infected, and may potentially infect others, without showing signs of disease. Some STIs can also be transmitted via the needles used in IV drug use, as well as through childbirth or breastfeeding. Sexually transmitted infections have been well-known for hundreds of years.
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Adjective
1. of or relating to the external sex organs; "genital herpes"; "venereal disease"
(synonym) genital

(n.)
The venereal disease; syphilis.
  

(a.)
Of or pertaining to venery, or sexual love; relating to sexual intercourse.
  

(a.)
Consisting of, or pertaining to, copper, formerly called by chemists Venus.
  

(a.)
Arising from sexual intercourse; as, a venereal disease; venereal virus or poison.
  

(a.)
Adapted to the cure of venereal diseases; as, venereal medicines.
  

(a.)
Adapted to excite venereal desire; aphrodisiac.
  

Having to do with sexual contact. The word venereal comes from Venus, the Roman godess of love. A venereal disease (a morbus venereus) is contracted and transmitted by sexual contact.