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noun
A unit of pressure.
synonym: pounds per square inch.
is a specific kind of: pressure unit.
Polish: funt na cal kwadratowy, psi
The 23rd letter of the Greek alphabet.
is a specific kind of: alphabetic character, letter, letter of the alphabet.
is a member of: Greek alphabet.
Dutch: psi
Find more on psi elsewhere: etymology - rhymes - Wikipedia.
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