psi
Multiple Entries:psi p.s.i.
Concise Oxford English Dictionary © 2008 Oxford University Press:
psi /psʌɪ, sʌɪ/
▶noun
- 1 the twenty-third letter of the Greek alphabet (Ψ, ψ), transliterated as ‘ps’.
- 2 supposed parapsychological or psychic faculties or phenomena.
– origin from Gk.
Concise Oxford English Dictionary © 2008 Oxford University Press:
p.s.i./piːesˈʌɪ/
▶abbreviation pounds per square inch.
'psi' also found in these Oxford entries:

