afterloading
/ˈɑːftələʊdɪŋ/ /ˈaftələʊdɪŋ/noun
1 Physiology. The subjection of a muscle to an afterload; the degree of afterload to which a muscle, especially the heart, is subjected.
2 Medicine. Insertion of a radioactive substance into a receptacle previously implanted at a specific site in the body; the type of radiotherapy that uses this technique.
Origin
1920s. Probably partly from afterload + -ing, and partly from after- + loading.