re·ver·tant | \ ri-ˈvər-tᵊnt 
\
\Definition of revertant
: a mutant gene, individual, or strain that regains a former capability (such as the production of a particular protein) by undergoing further mutation
yeast revertants
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revertant
nounre·ver·tant | \ ri-ˈvərt-ᵊnt \
\Medical Definition of revertant
: a mutant gene, individual, or strain that regains a former capability (as the production of a particular protein) by undergoing further mutation
yeast revertants
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Time Traveler for revertant
The first known use of revertant was in 1955
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