sexually transmitted disease
US /ˈsek.ʃu.ə.li trænzˌmɪt.ɪd dɪˈziːz/
UK /ˈsek.ʃu.ə.li trænzˌmɪt.ɪd dɪˈziːz/

1.
any disease that can be transmitted by sexual intercourse
:
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Regular testing for sexually transmitted diseases is important for sexual health.
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Public health campaigns aim to raise awareness about preventing sexually transmitted diseases.