Also known as: ps.
PS has various meanings in the Medical category. Discover the full forms, definitions, and usage contexts of PS in Medical.
Positronium is a system consisting of an electron and its anti-particle, a positron, bound together into an exotic atom, specifically an onium. The system is unstable the two particles annihilate each other to predominantly produce two or three gamma-rays, depending on the relative spin states.
MedicalLast updated: