brachytherapy/ˌbɹækiˈθɛrəpi/EtymologyFrom Ancient Greek βραχύς (brakhús, “short, not far off”) + θεραπεία (therapeía, “attendance, treatment, healing, service”); brachy- + therapy.brachytherapy means Radiotherapy using radioactive sources positioned within (or close to) the treatment volume, typically with radiopharmaceuticals as opposed to external-beam sources. Lexicurio rates it Sui generis — a strength score of 85 out of 100.nounRadiotherapy using radioactive sources positioned within (or close to) the treatment volume, typically with radiopharmaceuticals as opposed to external-beam sources.