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Word: mutant (lookup in dictionary) (lookup stats)
Dates: during 1940-1949
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Usage:

...years' experimentation with tissue cultures at the Institute, Dr. Wilton R. Earle transformed normal cells to cancerous cells by treatment with 20-methyl-cholanthrene, a coal-tar chemical. In an effort to determine what takes place in the mutant cells, he now plans to destroy existing cultures and re-outfit his laboratory for a fresh attack on the baffling problem...

Author: /time Magazine | Title: Medicine: War on Cancer | 5/20/1946 | See Source »

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