brach·y·ther·a·py 
(brăk′ē-thĕrə-pē)
(brăk′ē-thĕrə-pē)n. pl. brach·y·ther·a·pies
Radiotherapy in which the source of radiation is placed close to the surface of the body or within a body cavity.
[BRACHY- (in reference to the short distances involved) + THERAPY.]