See Also: radon(medicine)
Radon(health)
radon(dictionary)
radon(encyclopedia)
radon(dictionary)
radon daughters(medicine)

radon (iou)



radon noun. E20.
[from RADIUM after ARGON.]
A radioactive chemical element with a short half-life, atomic no. 86, which belongs to the group of noble gases and occurs naturally in trace amounts as a result of the decay of radium and other radioactive elements. (Symbol Rn.)
Comb.: radon seed a short tube containing radon that is used in radiotherapy as a source of alpha radiation.