psi

See also PSI, and P.S.I.

English

Ancient Greek Alphabet

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

Etymology 1

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

Pronunciation

Greek letter

• enPR: psī, sī, IPA: /psaɪ/, /saɪ/, SAMPA: /psaI/, /saI/

• Audio (US) (Greek letter)

  (file)

• Homophones: xi, sigh, scye, sai, Si (all for the latter pronunciation only)
• Rhymes: -aɪ

Psychic abilities

• enPR: sī, IPA: /saɪ/, SAMPA: /saI/

• Audio (US) (psychic abilities)

  (file)

• 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-fourth 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

Greek letter

Arabic: پسي (ar) (psii) m., بسي (ar) (bsii) m. Catalan: psi (ca) f. Chinese: Mandarin: 普西 (zh) (pǔxī) Czech: psí (cs) n. Dutch: psi (nl) m. and f. French: psi (fr) m. German: Psi (de) n.

Greek: ψι (el) (psi) n. Interlingua: psi (ia) Italian: psi (it) Japanese: プシー (ja) (pushī), プスィ (ja) (pusi), プサイ (ja) (pusai) Korean: 프시 (ko) (peusi) Polish: psi (pl) n. Portuguese: psi (pt) m. Russian: пси (ru) (psi) n. (indeclinable)

psychic energy

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: /psi/
• Homophones: psy, psys

Noun

psi m. inv.

1. psi (Greek letter)

Anagrams

• pis, spi

---

Italian

Noun

Wikipedia ^it

psi m. and f. inv.

1. psi (Greek letter)

---

Polish

Etymology 1

From pies

Pronunciation

• IPA: [pʲɕi]

Adjective

psi m. (not comparable)

1. canine, dog-

Declension

  Declension of psi

Case	Singular				Plural
	Personal and animate masculine	Inanimate masculine	Neuter	Feminine	Personal masculine	Neuter Feminine Non-personal masculine
Nominative Vocative	psi		psie	psia	psi	psie
Genitive	psiego			psiej	psich
Dative	psiemu				psim
Accusative	psiego	psi	psie	psią	psich	psie
Instrumental	psim				psimi
Locative				psiej	psich

Etymology 2

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

Pronunciation

• IPA: [ps̪ʲi]

Noun

psi n. (indeclinable)

1. psi; the Greek letter Ψ, ψ

---

Spanish

Noun

psi f. (plural psíes)

1. psi; the Greek letter Ψ, ψ