psi

A noun that can refer to a unit of pressure (pounds per square inch) or the 23rd letter of the Greek alphabet.

• 🇪🇸Sustantivo que puede designar una unidad de presión (libras por pulgada cuadrada) o la vigesimotercera letra del alfabeto griego.

1. Unit of pressure B2 formal

   A unit of pressure equal to one pound of force per square inch.

   • The tire pressure should be 32 psi.
   • The compressor can deliver up to 150 psi.
   • Check the psi rating before using the air pump.

   🇪🇸Libra por pulgada cuadrada

2. Greek letter B2 formal

   The 23rd letter of the Greek alphabet, often used in mathematics and science.

   • The symbol psi is used in quantum mechanics.
   • Psi is the 23rd letter of the Greek alphabet.
   • In psychology, psi is sometimes used to denote psychic phenomena.

   🇪🇸psi (letra griega)

• psis plural form
• psis' possessive plural form
• psi's possessive singular form