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]
• Pounds per square inch, a measure of pressure.