A generic technobabble particle; tailor-ons. That is you can tailor them to do what every you need them to do for the story. If you need radiation to turn the crew into Grape Jello, the tailoron is your baby. Of course you are going to call it something else. Berthod rays, Eichner radiation, it's all tailorons.
These differ from handwavium, which is solid matter (usually)