psi

[ sahy, psahy ]

Phonetic (Standard)IPA

noun

, plural psis.

psi

[ sahy ]

Phonetic (Standard)IPA

any purportedly psychic phenomenon, as psychokinesis, telepathy, clairvoyance, or the like.

psi

or p.s.i.

psi

/ psaɪ /

the 23rd letter of the Greek alphabet (Ψ, ψ), a composite consonant, transliterated as ps
1. paranormal or psychic phenomena collectively
2. ( as modifier )
  psi powers

psi

Origin of psi¹

1350–1400; Middle English < Greek pseî

Origin of psi²

1940–45; shortening of psychic or parapsychic

A combination of red and blue is presented by Φ (mistakenly marked on map No. 23 as ψ).

A small Greek Lexicon, from γ to ψ inclusive, also filthy, with several crude but vivid illustrations in red ink.

The elimination of ψ between the equation of conservation of angular momentum about the vertical, viz.

The angle ψ for the pedal is the same as the angle ψ for the curve.

Let ψ denote the inclination to the horizontal, and wδs the weight of an element δs.

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