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Having reverted to the normal phenotype, usually by a second mutation: a revertant mutant; revertant cells.
A revertant organism, cell, or strain.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(rɪˈvɜːtənt) biology
a mutant cell, organism, etc, that has reverted to an earlier form
having mutated to an earlier form
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(rɪˈvɜr tnt)
Biol. adj.
1. that has reverted to a previous form by undergoing a second mutation: a revertant strain.
2. a revertant gene, cell, organism, or strain.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Individual plate counts were recorded and the mean number of revertant colonies per plate as well as the standard deviation was calculated.
Although other published methods aim to exclude revertant fibers from the overall analysis, (12) the currently described method generates data for every fiber identified via merosin staining.
Schneider and her associates hypothesized that fractional ablative laser treatment and topical PLLA might help a 27-year-old RDEB patient with revertant mosaicism who presented for management of large, nonhealing erosions on her upper back and posterior neck, complicated by frequent Staphylococcus infections.
Jackson, "The molecular basis of brown, an old mouse mutation, and of an induced revertant to wild type," Genetics, vol.
A result was considered positive if a concentration-related increase in revertant colonies occurred and/or a reproducible biologically relevant increase in revertant colonies for at least one concentration occurred in at least one strain with or without metabolic activation.
In all the studied strains, no increase in the number of revertant colonies was detected, as well as no dose-dependence was observed (Table 3), suggesting the absence of mutagenic potential of 4b.
Also, the recombinant viruses used in the NYVAC transcriptional studies have not been controlled for the potential inadvertent selection of mutations during the generation of the recombinant viruses, through the construction of revertant viruses or sequencing of the complete viral genomes, and thus the presence of additional mutations in other genes that may influence the reported results cannot be formally ruled out [38, 39].
Revertant LSC are likely to rely on physiological extra-/intra-cellular signals for support of their survival and self-renewal.
The number of revertant colonies per his+ plate was measured after 66 h at 37[degrees]C.
TABLE 2: Number of Salmonella typhimurium TA97, TA198, TA100, TA1535, and TA102 revertant colonies per plate in the presence of the PBN derivate following the preincubation procedure of the Salmonella/microsome assay in the absence (-) and in the presence (+) of exogenous metabolizing system from rat liver S9-mix.
Until alternative vaccines become commercially available, control of AHS will remain reliant on the use of AHSV-LAV coupled with the adoption of strategies to minimize the likelihood of natural dissemination of revertant and reassortant vaccine-derived viruses.