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tpi

American  

  1. teeth per inch.

  2. turns per inch.

TPI British  

abbreviation

  1. tax and price index: a measure of the increase in taxable income needed to compensate for an increase in retail prices

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.