pasteurization

noun

pas·​teur·​i·​za·​tion ˌpas-chə-rə-ˈzā-shən 

ˌpas-tyə-, 

-tə-

1

: partial sterilization of a substance and especially a liquid (such as milk) at a temperature and for a period of exposure that destroys objectionable organisms without major chemical alteration of the substance

2

: irradiation of food products

Examples of pasteurization in a Sentence

Recent Examples on the Web

Making the powder involves several steps, including milk testing and pasteurization, the separation of curds and whey, draining and pasteurizing the liquid whey, and then sending it to a processing facility to remove more liquid via evaporation and spray drying. —Alyssa Goldberg, USA Today, 2 June 2026

This week in 1862, the first test of pasteurization was completed by Louis Pasteur and Claude Bernard. —Scott Lafee, San Diego Union-Tribune, 21 Apr. 2026

Finally, adef–known online for using Pokémon to teach math and physics–explains how an alcoholic beverage and a disgruntled friend actually led Louis Pasteur to create the pasteurization process. —Popular Science Team, Popular Science, 25 Mar. 2026

This slow, low-temperature pasteurization method retains the milk’s fresh flavor and creaminess; higher temperatures destroy volatile aromatic compounds and denature milk proteins. —Sean Timberlake, Sacbee.com, 13 Mar. 2026

Word History

First Known Use

1886, in the meaning defined at sense 1

Rhymes for pasteurization

• abbreviation
• abomination
• acceleration
• accentuation
• accommodation
• accreditation
• acculturation
• accumulation
• acetylation
• adjudication
• administration
• adulteration

Kids Definition

pasteurization

noun

pas·​teur·​i·​za·​tion ˌpas-chə-rə-ˈzā-shən 

ˌpas-tə-

: the process of heating a liquid (as milk) to a temperature high enough and keeping it at that temperature long enough to kill many objectionable germs and then cooling it rapidly without causing a major change in its chemical composition

Medical Definition

pasteurization

noun

pas·​teur·​iza·​tion

variants also British pasteurisation

ˌpas-chə-rə-ˈzā-shən, ˌpas-tə- 

1

: partial sterilization of a substance and especially a liquid (as milk) at a temperature and for a period of exposure that destroys pathogenic microorganisms

2

: partial sterilization of perishable food products (as fruit or poultry) with radiation (as gamma rays emitted by cobalt 60)