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1 : British biochemist (born in Germany) who isolated and purified penicillin, which had been discovered in 1928 by Sir Alexander Fleming (1906-1979)

2 : a large tracked vehicle that is propelled by two endless metal belts; frequently used for moving earth in construction and farm work

3 : British biochemist (born in Germany) who isolated and purified penicillin, which had been discovered in 1928 by Sir Alexander Fleming (1906-1979)

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