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Definition of p.s.i. abbreviation from the Oxford Advanced Learner's Dictionary

p.s.i.

abbreviation

/ˌpiː es ˈaɪ/

/ˌpiː es ˈaɪ/

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pounds per square inch
(used for giving the pressure of tyres, etc.)

See p.s.i. in the Oxford Advanced American Dictionary

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noun

From the Topic

B2

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