revertant
noun
re·ver·tant ri-ˈvər-tᵊnt 
: 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
revertant adjective
Word History
First Known Use
1955, in the meaning defined above
Medical Definition
revertant
noun
re·ver·tant ri-ˈvərt-ᵊnt
: a mutant gene, individual, or strain that regains a former capability (as the production of a particular protein) by undergoing further mutation
yeast revertants