How do Klingons refer to actinides, which are a group of radioactive elements in the periodic table? According to The Mind's Eye, the asteroids in the Ikalian asteroid belt have actinides in them, which "provide positive protection against [Klingon] sensors".

The group as a whole is termed va’ghev baSmey, though frequently it’s just va’ghevmey. An individual member of the group may be referred to as a va’ghev baS (or just va’ghev).