Protium or hydrogen-1 is the most common isotope of the element hydrogen, with one proton, one electron, and no neutrons.
Protium may also refer to: Protium (plant), a genus of chiefly tropical American trees in the family Burseraceae, having fragrant wood Cadence Protium, hardware accelerated prototyping platforms for early software development by Cadence Design Systems
See also
Protonix, a commercial name for pantoprazole, a proton pump inhibitor drug Protonium, an onium, a proton-antiproton pair