A slang term for a Nuclear Weapon. Nuclear weapons come in three types; Radiological, which means a regular weapon laced with radioactive materials; Fission; which means the weapon acheives vast release of energy by splitting atoms and can destroy a city; and Fusion, also called Thermonuclear; which means the weapon reaches collosal release of energy by fusing atoms into heavier ones and can destroy a good portion of a country. Nuclear weapons-and radioactive material in general-is marked out by a symbol known as a "trifoil", which consists of three interlocking triangles attached to a black circle in the center, and is usually contained within a black border.