Definition: Meaning of, Pasteur, Louis in English to English dictionary.
Pronunciation:/ paˈstəː;pastœʀ /
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(1822-95) a French SCIENTIST who established the study of MICROBIOLOGY (=the study of very small living things such as BACTERIA ), and proved that disease can be caused by GERM s . He also studied fermentation (= the process by which substances change chemically and become filled with gas by the action of BACTERIA), and invented the process of pasteurization . He also developed some VACCINE s (= substances that are put into people's bodies to protect them from diseases) .