Word: Plutonium Pit
Part of Speech: Noun
Definition: A plutonium pit is a spherical object, usually made of steel or beryllium, that contains a specific type of plutonium called plutonium-239. When explosives compress the pit, it triggers a nuclear reaction called fission, which releases a large amount of energy.
"Plutonium pit" is a technical term used in nuclear science to describe a specific component of nuclear weapons.