revertantadj.n.

Brit.

/rᵻˈvəːt(ə)nt/, U.S.

/rəˈvərtnt/,

/riˈvərtnt/

Origin: Formed within English, by derivation. Etymons: revert v., -ant suffix¹.

Etymology: < revert v. + -ant suffix¹. Compare earlier reverting adj. With sense A. 1 (which is unparalleled in French) compare also vertant adj.

A. adj.

†1. Heraldry. As postmodifier. Bent or curved back, esp. in the shape of an S. Obsolete.

ΘΚΠ

society > communication > indication > insignia > heraldic devices collective > heraldic representations of creatures > [adjective] > S-shaped

torqued1572

revertant1688

1688 R. Holme Acad. Armory ii. 456/2 Some also I find to blazon this Coat by the name of a Cressant, the horns (or sharp points) revertant, or turning outward.

1828 W. Berry Encycl. Her. I. Revertant, or Reverted, that is, flexed and reflexed, or bending in the form of an S; though it is sometimes used for a bending in the manner of a cheveron.

1847 H. Gough Gloss. Terms Brit. Heraldry 268 Revertant, bent and rebent.

2. Biology. That has undergone reverse mutation; that has reverted to the normal type from a mutant or abnormal state.

ΘΚΠ

the world > life > biology > biological processes > genetic activity > genetic constitution > [adjective] > phenotype > revertant

revertant1955

1955 Genetics 40 893 Both revertant (adenine-independent, non-purple) and non-revertant (adenineless, purple) components could be separated by conidial platings.

1970 Nature 5 Dec. 908/1 Revertant cells selected from this line exhibit many of the properties of untransformed cells.

2009 Virus Res. 139 234/1 Specific mutation..yielded revertant viruses that restored viral replication.

B. n.

Biology. A revertant cell, organism, strain, cell, etc.

ΘΚΠ

the world > life > biology > biological processes > genetic activity > genetic constitution > [noun] > phenotype > revertant

revertant1953

1953 Proc. National Acad. Sci. U.S.A. 39 479 Occasional phenotypically atypical revertants were recovered.

1971 Nature 25 June 488/1 By applying selection pressures to cultures of transformed malignant cells it is possible to select so-called revertants—cells which behave in culture as if they were normal.

2007 A. J. F. Griffiths et al. Introd. Genetic Anal. (ed. 9) xv. 530 (caption) The presence of revertants indicates that the chemical is a mutagen and possibly a carcinogen.

This entry has been updated (OED Third Edition, March 2010; most recently modified version published online March 2022).

单词	revertant
释义	revertantadj.n. Brit. /rᵻˈvəːt(ə)nt/, U.S. /rəˈvərtnt/, /riˈvərtnt/ Origin: Formed within English, by derivation. Etymons: revert v., -ant suffix¹. Etymology: < revert v. + -ant suffix¹. Compare earlier reverting adj. With sense A. 1 (which is unparalleled in French) compare also vertant adj. A. adj. †1. Heraldry. As postmodifier. Bent or curved back, esp. in the shape of an S. Obsolete. ΘΚΠ society > communication > indication > insignia > heraldic devices collective > heraldic representations of creatures > [adjective] > S-shaped torqued1572 revertant1688 1688 R. Holme Acad. Armory ii. 456/2 Some also I find to blazon this Coat by the name of a Cressant, the horns (or sharp points) revertant, or turning outward. 1828 W. Berry Encycl. Her. I. Revertant, or Reverted, that is, flexed and reflexed, or bending in the form of an S; though it is sometimes used for a bending in the manner of a cheveron. 1847 H. Gough Gloss. Terms Brit. Heraldry 268 Revertant, bent and rebent. 2. Biology. That has undergone reverse mutation; that has reverted to the normal type from a mutant or abnormal state. ΘΚΠ the world > life > biology > biological processes > genetic activity > genetic constitution > [adjective] > phenotype > revertant revertant1955 1955 Genetics 40 893 Both revertant (adenine-independent, non-purple) and non-revertant (adenineless, purple) components could be separated by conidial platings. 1970 Nature 5 Dec. 908/1 Revertant cells selected from this line exhibit many of the properties of untransformed cells. 2009 Virus Res. 139 234/1 Specific mutation..yielded revertant viruses that restored viral replication. B. n. Biology. A revertant cell, organism, strain, cell, etc. ΘΚΠ the world > life > biology > biological processes > genetic activity > genetic constitution > [noun] > phenotype > revertant revertant1953 1953 Proc. National Acad. Sci. U.S.A. 39 479 Occasional phenotypically atypical revertants were recovered. 1971 Nature 25 June 488/1 By applying selection pressures to cultures of transformed malignant cells it is possible to select so-called revertants—cells which behave in culture as if they were normal. 2007 A. J. F. Griffiths et al. Introd. Genetic Anal. (ed. 9) xv. 530 (caption) The presence of revertants indicates that the chemical is a mutagen and possibly a carcinogen. This entry has been updated (OED Third Edition, March 2010; most recently modified version published online March 2022). < adj.n.1688
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