Protium

Protium may refer to:

• Protium, isotope hydrogen-1, the most common isotope of the element hydrogen, with one proton, one electron, and no neutrons
• Protium (plant), a genus of chiefly tropical American trees in the family Burseraceae, having fragrant wood
• Protium, a commercial name for pantoprazole, a so-called "proton inhibitor" drug
• Cadence Protium, a series of hardware accelerated prototyping platforms for early software development, by Cadence Design Systems