psi

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

Greek letter

• enPR: psī, sī, IPA^(key): /psaɪ/, /saɪ/

• Audio (US) (Greek letter)

  (file)

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

Psychic energy

• enPR: sī, IPA^(key): /saɪ/

• Audio (US) (psychic energy)

  (file)

• Homophones: xi, sigh, scye, sai, Si
• Rhymes: -aɪ

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.’

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

Initialism

• P.S.I.
• PSI

psi

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

• IPS, IPs, ISP, Isp, iPS, isp, pis, sip

• (Balearic, Central, Valencian) IPA^(key): /ˈpsi/

psi f (plural psis)

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

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

psi m (plural psi)

1. psi (Greek letter)

• “psi” in le Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

• pis, spi

• Rhymes: -i

psi m or f (invariable)

1. psi (Greek letter)

From pies.

• IPA^(key): /pɕi/

psi (not comparable)

1. canine, dog-

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

• IPA^(key): /psi/

psi n (indeclinable)

1. psi; the Greek letter Ψ, ψ

• psi in Polish dictionaries at PWN

psi m (plural psis)

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

• IPA^(key): /ˈpsi/
• Rhymes: -i

psi f (plural psíes)

1. psi; the Greek letter Ψ, ψ