German

Noun

Psi n ‎(genitive Psi or Psis, plural Psis)

1. psi (Greek letter)

Declension

Related terms

• Psioniker
• Psi-Phänomen

English

Ancient Greek Alphabet

← chi		→ omega
Ψ ψ Ancient Greek: ψεῖ
Wikipedia article on psi

Pronunciation

Greek letter

• enPR: psī, sī, IPA^(key): /psaɪ/, /saɪ/
• Homophones: xi, sigh, scye, sai, Si (all for the latter pronunciation only)
• Rhymes: -aɪ

Psychic energy

• enPR: sī, IPA^(key): /saɪ/
• Homophones: xi, sigh, scye, sai, Si
• Rhymes: -aɪ

Noun

psi ‎(countable and uncountable, plural psis)

1. (countable) The twenty-third letter of Classical and Modern Greek and the twenty-fifth letter of Old and Ancient Greek.
2. (uncountable, parapsychology) A form of psychic energy.
   • 1993, Will Self, My Idea of Fun:

     ‘Come, lad,’ he said. ‘We will take tea together and speak of the noumenon, the psi and other more heterogenous phenomena.’

Translations

See also

• (Greek letter): Previous: chi, Next: omega

Etymology 2

Initialism

Alternative forms

• P.S.I.
• PSI

Initialism

psi

1. Pounds per square inch (an imperial unit of pressure)

Anagrams

• IPS, IPs, ISP, pis, sip

Catalan

Noun

psi f ‎(plural psis)

1. Psi; the Greek letter Ψ (lowercase ψ).

French

Pronunciation

• IPA^(key): /psi/
• Homophones: psy, psys

Noun

psi m ‎(plural psi)

1. psi (Greek letter)

Anagrams

• pis, spi

Italian

Noun

psi m, f ‎(invariable)

1. psi (Greek letter)

Polish

Etymology 1

From pies

Pronunciation

• IPA^(key): [pʲɕi]

Adjective

psi m ‎(not comparable)

1. canine, dog-

Declension

Etymology 2

From Ancient Greek ψῖ ‎(psî), the name for the twenty-third letter of the alphabet (Ψ, ψ).

Pronunciation

• IPA^(key): [ps̪ʲi]

Noun

psi n ‎(indeclinable)

1. psi; the Greek letter Ψ, ψ

Portuguese

Noun

psi m (plural psis)

1. (countable) psi (name of the Greek letter Ψ)

Spanish

Noun

psi f ‎(plural psíes)

1. psi; the Greek letter Ψ, ψ