psi

1 of 3

noun (1)

ˈsī  ˈpsī 

: the 23rd letter of the Greek alphabet see Alphabet Table

psi

2 of 3

noun (2)

ˈsī 

: parapsychological psychic phenomena or powers

psi

3 of 3

abbreviation

pounds per square inch

Word History

Etymology

Noun (1)

Middle English, from Medieval Latin, from Late Greek, from Greek psei

Noun (2)

probably by shortening & alteration from psychic

First Known Use

Noun (1)

15th century, in the meaning defined above

Noun (2)

1942, in the meaning defined above

Phrases Containing psi

• J/psi particle
• psi particle

Rhymes for psi

• ai
• aye
• bae
• bi
• buy
• by
• bye
• chai
• chi
• cry
• die
• dry

Kids Definition

psi

noun

ˈsī

: the 23rd letter of the Greek alphabet

—Ψ or ψ

Medical Definition

psi

1 of 2 adjective

ˈsī 

: relating to, concerned with, or being parapsychological psychic events or powers

psi phenomena

psi

2 of 2 noun

: psi events or phenomena