Psi (disambiguation)

This disambiguation page lists articles associated with the same or a similar title.

• Psi (Greek letter) [r]: The 23rd letter of the Greek alphabet, written as $\Psi$ (upper-case) and $\psi$ (lower-case). ^[e]
• Pneumonia severity index [r]: A clinical prediction rule to estimate the probability of complications in patients with community acquired pneumonia. ^[e]
• Psi (unit) [r]: A unit of pressure in the U.S. customary units and defined as the pressure exerted by a force of one pound-force applied to an area of one square inch. ^[e]