psi

noun

Parapsychological phenomena or abilities considered as a group.

abbreviation

pounds per square inch

noun

The 23rd letter of the Greek alphabet.

noun

A Greek letter, Ψ, ψ. It belongs to the Ionic alphabet, and stands for ps or phs. The character may be a modification of Φ, φ.

initialism

Pounds per square inch (an imperial unit of pressure)

noun

The twenty-third letter of Classical and Modern Greek and the twenty-fourth letter of Old and Ancient Greek.

noun

A form of psychic energy.

noun

the 23rd letter of the Greek alphabet

noun

a unit of pressure