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[pas-chuh-rahyz, pas-tuh-] /ˈpæs tʃəˌraɪz, ˈpæs tə-/
verb (used with object), pasteurized, pasteurizing.
to expose (a food, as milk, cheese, yogurt, beer, or wine) to an elevated temperature for a period of time sufficient to destroy certain microorganisms, as those that can produce disease or cause spoilage or undesirable fermentation of food, without radically altering taste or quality.
Origin of pasteurize
1880-85; Pasteur + -ize
Related forms
pasteurization, noun
superpasteurized, adjective
ultrapasteurized, adjective
unpasteurized, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for pasteurize
  • They do not pasteurize the beer, so all of the beers served in the brewpub are less than three months old.
  • These nonprofit operations collect milk from donors and process and pasteurize it to meet certain quality and safety standards.
  • Three processes used to pasteurize foods are flash pasteurization, steam pasteurization, and irradiation pasteurization.
  • pasteurize milk and dairy products from cows, sheep, or goats.
  • We will investigate the effectiveness of two irradiation methods to pasteurize barley.
  • Elevated temperature can pasteurize or sterilize softwood chips, sawn wood, or logs.
  • Using today's approved technology, the only realistic way to achieve the proposed reduction is to pasteurize all juices.
  • For example, it is used commercially for deli meats and to pasteurize some juices.
  • The milk is graded and tested to make sure that the milk is clean enough to pasteurize in the first place.
British Dictionary definitions for pasteurize


/ˈpæstəˌraɪz; -stjə-; ˈpɑː-/
verb (transitive)
to subject (milk, beer, etc) to pasteurization
(rare) to subject (a patient) to pasteurism
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for pasteurize

1881, with -ize, after Louis Pasteur (1822-1895), French chemist and bacteriologist, who invented the process of heating food, milk, wine, etc., to kill most of the micro-organisms in it; distinguished from sterilization, which involves killing all of them. The surname is literally "Pastor." Related: Pasteurized; pasteurizing.

Online Etymology Dictionary, © 2010 Douglas Harper
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pasteurize in Medicine

pasteurize pas·teur·ize (pās'chə-rīz', pās'tə-)
v. pas·teur·ized, pas·teur·iz·ing, pas·teur·iz·es
To treat by pasteurization.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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