Crossword Genius

Giant of microbiology (7)

Ross

I believe the answer is:

pasteur

(Other definitions for pasteur that I've seen before include "Louis --, French chemist/bacteriologist" , "He developed the partial sterilization of milk" , "Louis -, nineteenth century French chemist" , "He invented a method to stop milk causing disease" , "French chemist and biologist (1822-1895)" .)

I've seen this clue in the Newsday.
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