Explore: Psi

Look up PSI, Psi, or psi in Wiktionary, the free dictionary. Psi, PSI or Ψ may refer to: Psi (Greek) (Ψ or ψ), the twenty-third letter of the Greek alphabet

The pound per square inch (abbreviation: psi) or, more accurately, pound-force per square inch (symbol: lbf/in2), is a unit of measurement of pressure

Psi /ˈ(p)saɪ, ˈ(p)siː/ (P)SY, (P)SEE (uppercase Ψ, lowercase ψ or 𝛙; Greek: ψι psi [ˈpsi]) is the twenty-third and penultimate letter of the Greek alphabet

Omega Psi Phi Fraternity, Inc. (ΩΨΦ) is an international historically African-American social fraternity. It was founded on November 17, 1911 at Howard

Kappa Alpha Psi Fraternity, Inc. (ΚΑΨ) is a historically African American fraternity. Since the fraternity's founding on January 5, 1911, at Indiana University

Psi hit and psi miss are terms used in discussion of parapsychological experimentation to describe the success or failure of the subject in achieving

Association divides psi into two main categories: psi-gamma for extrasensory perception and psi-kappa for psychokinesis. In popular culture, "psi" has become

Psi Upsilon (ΨΥ), commonly known as Psi U, is a North American fraternity, founded at Union College on November 24, 1833. The fraternity has chartered

{\displaystyle \psi _{u}={\begin{pmatrix}0\\1\end{pmatrix}}} , that is, ψ = α ψ l + β ψ u {\displaystyle \psi =\alpha \psi _{l}+\beta \psi _{u}} for complex

officially called Unified PSI–PSDI (PSI–PSDI Unificati), was the name of the federation of parties formed by the Italian Socialist Party (PSI) and the Italian