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revertant

[ri-vur-tnt]Genetics.
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noun
  1. a gene, organism, or strain that has undergone a back mutation.
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adjective
  1. of or relating to a gene, organism, or strain that has undergone a back mutation.
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Origin of revertant

1580–90, for an earlier sense; revert + -ant
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

revertant in Medicine

revertant

(rĭ-vûrtnt)
adj.
  1. Having reverted to the normal phenotype, usually by a second mutation.
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n.
  1. A revertant organism, cell, or strain.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.