A dilithium bomb was a fictional explosive weapon which Kira Nerys, under the alias of Bata Huri, once threatened to use on the Cardassian mining moon of Davonia.
History and specifics[]
In the year 2370, she claimed the dilithium-based weapon would result in radiation poisoning and hoped the threat would spur the Cardassians on the moon into departing making her mission there a bit easier. (DS9 novel: Devil in the Sky)