potassium-40

n.

A naturally occurring beta-emitting radioactive isotope of potassium having a half-life of 1.3 billion years; it is the chief source of natural radioactivity of living tissue.

Words nearby potassium-40

potassium permanganate, potassium phosphate, potassium sulfate, potassium sulphate, potassium thiocyanate, potassium-40, potassium-42, potassium-43, potassium-argon dating, potation, potato