STD

(Medicine) disease that is most often contracted through sexual contact (e.g. gonorrhea, syphilis, AIDS, and genital herpes)

STD is a three letter acronym which may refer to:Sexually transmitted disease, or sexually transmissible diseaseDoctor of Sacred Theology, (Sacrae Theologiae Doctor)São Tomé and Príncipe dobra, the ISO 4217 code for the currency of São Tomé and PríncipeStandards or StandardizationStandard deviation, a statistical measureInternet standard, a subset of the Request for CommentsState transition diagram, a graphical representation for a finite state machineSubscriber trunk dialling, or subscriber toll dialling, the standard codes for telephone dialing in India, the United Kingdom and the Republic of IrelandThe Scottish Football League Third DivisionKim Possible Movie: So The Drama, the commonly abbreviated subtitle of the second Kim Possible movieScheduled Time of Departure
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STD abbr. sexually transmitted disease Sexually transmitted diseases A group of diseases which are transmitted by sexual contact. [more]STD - Community and Resources

HR, hour, period of 60 minutes

Sexually transmitted disease.