| transuranic element | |
noun | |
| any element having an atomic number greater than 92 (which is the atomic number of uranium); all are radioactive |
| a white, crystalline, water-insoluble, powerful high explosive, C3H6N6O6, used chiefly in bombs and shells. |
| an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language. |