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psi
Douglas Harper's Etymology Dictionary
psi

23rd letter of the Greek alphabet. Use for "psychic force, paranormal phenomenon" dates from 1942 (probably from psychic (adj.)).

Wiktionary
psi

Etymology 1 n. 1 (context countable English) The twenty-third letter of Classical Greek and Modern Greek and the twenty-fifth letter of Old Greek and Ancient Greek. 2 (context uncountable parapsychology English) A form of psychic energy. Etymology 2

alt. pound per square inch (qualifier: an imperial unit of pressure) init. pound per square inch (qualifier: an imperial unit of pressure)

WordNet
psi
  1. n. a unit of pressure [syn: pounds per square inch]

  2. the 23rd letter of the Greek alphabet

Wikipedia
Psi

Psi or PSI or Ψ may refer to:

Psi (letter)

Psi (uppercase , lowercase ; Psi) is the 23rd letter of the Greek alphabet and has a numeric value of 700. In both Classical and Modern Greek, the letter indicates the combination /ps/ (as in English word "lapse").

For Greek loanwords in Latin and modern languages with Latin alphabets, psi is usually transliterated as "ps". In English, the letter is pronounced or sometimes . (In Greek, it is pronounced .)

The letter's origin is uncertain. It may or may not derive from the Phoenician alphabet. It appears in the 7th century BC, expressing /ps/ in the Eastern alphabets, but /kʰ/ in the Western alphabets (the sound expressed by Χ in the Eastern alphabets). In writing, the early letter appears in an angular shape . There were early graphical variants that omitted the stem ("chickenfoot-shaped psi" as: or ).

The Western letter (expressing /kʰ/, later /x/) was adopted into the Old Italic alphabets, and its shape is also continued into the Algiz rune of the Elder Futhark. The classical Greek letter was adopted into the early Cyrillic alphabet as " Ѱ".

PSI (album)

PSI is an album by the industrial rock band Pitchshifter, released in 2002 (see 2002 in music). Their previous two albums had been released on a major label, but this was released by the minor Mayan Records, a subsidiary label owned by Sanctuary Records. "Eight Days" and "Shutdown" were released as singles.

Psi (instant messaging client)

Psi is a free instant messaging client for the XMPP protocol (including such services as Google Talk) which uses the Qt toolkit. It runs on Linux (and other Unix-like operating systems), Windows, Mac OS X and eComStationPsi build for OS/2. Version 0.15, ZIP package. ( OS/2).

Ready-to-install deb and RPM packages are available for many Linux distributions. Successful ports of Psi were reported for Haiku, FreeBSD and Sun Solaris operating systems.

Due to Psi's free/open-source nature, several forks have appeared, which occasionally contain features that may appear in future official Psi versions. These official and unofficial builds are documented on their external wiki page.

PSI (computational chemistry)

PSI is an ab initio computational chemistry package originally written by the research group of Henry F. Schaefer, III ( University of Georgia). It performs high-accuracy quantum computations on small to medium-sized molecules.

PSI4 is the latest release of the program package - it is open source, released as free under the GPL through GitHub. Primary development of PSI4 is currently conducted by Daniel Crawford ( Virginia Tech), David Sherrill ( Georgia Tech), Justin Turney ( University of Georgia), and Rollin King ( Bethel University). PSI4 is available on Linux releases such as Fedora and Ubuntu.

Psi (comics)

Psi is a DC character created by Paul Kupperberg and Carmine Infantino for Daring New Adventures of Supergirl #1 (November 1982).

Psi (Cyrillic)

Psi (Ѱ, ѱ) is a letter in the early Cyrillic alphabet, derived from the Greek letter psi (Ψ, ψ). It represents the sound /ps/, as in English naps. According to the school rules developed in the sixteenth and seventeenth centuries, such as Meletius Smotrytsky's grammar book, it was intended for use in words loaned from Greek—but it was occasionally used for writing native words, for example Ukrainian (psy, “dogs”). It was used especially in words relating to the Church, as can be seen in its continuing use in Church Slavonic.

Psi was eliminated from the Russian orthography along with ksi, omega, and yus in the Civil Script of 1708 ( Peter the Great's Grazhdansky Shrift), and has also been dropped from other secular languages. It continues to be used in Church Slavonic.

Usage examples of "psi".

Psi is easier, and the cops will be welcome to use all the Psi technique they can dig up: telepathy, clairvoyance, hexing, prekenners.

Only Jai knew the truth: his great-grandfather had bred psi traits into the imperial line.

I might suggest that on the evidence of the psychokinetic energy already observed to be a force of considerable magnitude, a PSI energy acts as a kind of beam which I transmit but do not have full control over.

Human psi ability was a strictly scientific field these days, quantified and researched.

PSI Police Director all these years when he assured me readjustment did no permanent damage to these people, that they were reassimilated into society with ease.

The Psi Phi girls were known as the Trekkies, after the old sci-fi TV series, Star Trek.

The psis were uncollared for visits with their social workers, and surprise inspections became the rule.

A sonic stunner was a surer bet than a hypothetical, undependable psi power.

Finding one, she moves into the glacier at a jog, dropping her biomorphic shield when the pressure moves above three psi and the temperature rises within thirty degrees of freezing.

And in the unlikely event it happened to float ashore before scavenging crabs, lobsters, and groundfish picked it apart, even an honest investigator would conclude Ricci had died from an out-of-air accident due to instrument failure, based upon a post mortern exam and the faulty reading on his psi gauge.

The vermin have been mutating and evolving much faster, and have made the breakthrough of nonmutant psi before man.

Did CC really have to have these psis checking out passengers, or was it gathering data for the aggrandizement of its own power?

Also, there are a great many psis on CCC, interfering with clear perception of such things.

The system had no doubt been designed with psi in mind, since some psis were hypnotists and others controlled minds directly.

For every first-class psi like you, Hermine, there are about ninety-nine lesser psis, and about half of them are so negative as to perish soon, and many of the rest are mental cripples.