supertwistedadj.

Brit.

/ˈsuːpətwɪstᵻd/,

/ˈsjuːpətwɪstᵻd/, U.S.

/ˈsupərˌtwɪstᵻd/

Origin: Formed within English, by derivation. Etymons: super- prefix, twisted adj.

Etymology: < super- prefix + twisted adj., after supertwist n.

1. Having a supertwist (supertwist n. 1). In later use: (Biochemistry) designating DNA which has a superhelical structure.

ΚΠ

1930 New Castle (Pa.) News 17 Dec. 13/4 (advt.) The supertwisted threads in these fine stockings make them permanently lustreless.

1947 Amer. Antiq. 12 241/2 Other portions of the same yarn have angles characterizing medium- or hard-twisted, even super-twisted yarns.

1965 Sci. News Let. 19 June 391/2 Dr. Vinograd and his associates unlocked the super-twisted configuration by using an enzyme called pancreatic DNAase.

1990 Proc. National Acad. Sci. U.S.A. 87 5056/1 When binding [of RecA protein] occurs on negatively supertwisted DNA, the DNA becomes progressively unwound.

2006 G. M. Blackburn et al. Nucleic Acids in Chem. & Biol. (ed. 3) ii. 46 The molecular topology of closed circular DNA..is especially associated with the phenomenon of superhelical DNA, which is also called supercoiled or supertwisted DNA.

2. Electronics. More fully supertwisted nematic. Of a liquid crystal display: that rotates the plane of polarized light passing through the display by more than 90 degrees (typically by between 180 and 270 degrees). Also: of or relating to such a display. Cf. twisted nematic adj. at twisted adj. Additions.

ΚΠ

1985 Displays 6 149/1 This ‘supertwisted birefringence effect’ (SBE) seems to be serious competition for the well-known twisted nematic (TN) effect in the field of complex dot-matrix devices.

1993 New Scientist 31 July 36/1 (caption) Supertwisted nematic liquid-crystal display: the best image quality is achieved by displays that include crystals with a 270° twist angle.

1997 P. J. Collings & M. Hird Introd. Liquid Crystals: Chem. & Physics vi. 115 A chiral material is required in the so-called supertwisted nematic (STN) displays where a twist in the nematic director of more than 90° is employed.

2007 CIO (Nexis) 13 June Motorola proposed using either cholesteric liquid crystal or polymer-disbursed liquid crystal in the display, instead of super-twisted nematic liquid crystals.

This is a new entry (OED Third Edition, June 2012; most recently modified version published online March 2022).

单词	supertwisted
释义	supertwistedadj. Brit. /ˈsuːpətwɪstᵻd/, /ˈsjuːpətwɪstᵻd/, U.S. /ˈsupərˌtwɪstᵻd/ Origin: Formed within English, by derivation. Etymons: super- prefix, twisted adj. Etymology: < super- prefix + twisted adj., after supertwist n. 1. Having a supertwist (supertwist n. 1). In later use: (Biochemistry) designating DNA which has a superhelical structure. ΚΠ 1930 New Castle (Pa.) News 17 Dec. 13/4 (advt.) The supertwisted threads in these fine stockings make them permanently lustreless. 1947 Amer. Antiq. 12 241/2 Other portions of the same yarn have angles characterizing medium- or hard-twisted, even super-twisted yarns. 1965 Sci. News Let. 19 June 391/2 Dr. Vinograd and his associates unlocked the super-twisted configuration by using an enzyme called pancreatic DNAase. 1990 Proc. National Acad. Sci. U.S.A. 87 5056/1 When binding [of RecA protein] occurs on negatively supertwisted DNA, the DNA becomes progressively unwound. 2006 G. M. Blackburn et al. Nucleic Acids in Chem. & Biol. (ed. 3) ii. 46 The molecular topology of closed circular DNA..is especially associated with the phenomenon of superhelical DNA, which is also called supercoiled or supertwisted DNA. 2. Electronics. More fully supertwisted nematic. Of a liquid crystal display: that rotates the plane of polarized light passing through the display by more than 90 degrees (typically by between 180 and 270 degrees). Also: of or relating to such a display. Cf. twisted nematic adj. at twisted adj. Additions. ΚΠ 1985 Displays 6 149/1 This ‘supertwisted birefringence effect’ (SBE) seems to be serious competition for the well-known twisted nematic (TN) effect in the field of complex dot-matrix devices. 1993 New Scientist 31 July 36/1 (caption) Supertwisted nematic liquid-crystal display: the best image quality is achieved by displays that include crystals with a 270° twist angle. 1997 P. J. Collings & M. Hird Introd. Liquid Crystals: Chem. & Physics vi. 115 A chiral material is required in the so-called supertwisted nematic (STN) displays where a twist in the nematic director of more than 90° is employed. 2007 CIO (Nexis) 13 June Motorola proposed using either cholesteric liquid crystal or polymer-disbursed liquid crystal in the display, instead of super-twisted nematic liquid crystals. This is a new entry (OED Third Edition, June 2012; most recently modified version published online March 2022). < adj.1930
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