supertwistn.

Brit.

/ˈsuːpətwɪst/,

/ˈsjuːpətwɪst/, U.S.

/ˈsupərˌtwɪst/

Origin: Formed within English, by derivation. Etymons: super- prefix, twist n.¹

Etymology: < super- prefix + twist n.¹ Compare supertwisted adj.

1. An additional twist in an already twisted structure or thing. In later use: (Biochemistry) such a twist in a helical molecule of DNA (cf. superhelix n.).

ΚΠ

1928 Brit. Patent 298,938 2/2 On leaving its bobbin..each thread is twisted on itself, independently of the twist it may have previously received... This super-twist will be the greater in proportion.

1959 U.S. Patent 2,895,288 1 In a modification of this process a rayon yarn is given a super-twist, moistened to set the twist, [etc.].

1965 Sci. News Let. 19 June 391/2 This reaction, started by DNAase or by a reducing agent such as hydroquinone, allows the super-twist to unwind.

1987 New Scientist 15 Jan. 27/1 The domains undergo a process of ‘supercoiling’ into 400 ‘supertwists’, a process catalysed by an enzyme complex called DNA gyrase.

2005 D. P. Clark Molecular Biol. iv. 90 Gyrase works by cutting both strands of the DNA, introducing a supertwist and rejoining the DNA strands.

2. Electronics. A type of liquid crystal display used in portable computers, mobile phones, etc., in which the plane of polarized light passing through the display is rotated by more than 90 degrees (typically by between 180 and 270 degrees), providing greater contrast than a twisted nematic display. Chiefly attributive.

ΚΠ

1985 C. M. Waters et al. in Molecular Crystals & Liquid Crystals 123 304 The comparison with the normal twisted nematic device which has only π/2 twist gives the new device its alternative name of the ‘supertwist device’.

1993 Compute Sept. 89/1 The Nomad's 10-inch LCD (measured diagonally) is a backlit, triple supertwist unit that affords good viewing in all lighting conditions.

2003 S. Mueller Upgrading & Repairing PCs (ed. 14) xv. 855 Thanks to supertwist and triple-supertwist LCDs, today's screens enable you to see the screen clearly from more angles with better contrast and lighting.

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

单词	supertwist
释义	supertwistn. Brit. /ˈsuːpətwɪst/, /ˈsjuːpətwɪst/, U.S. /ˈsupərˌtwɪst/ Origin: Formed within English, by derivation. Etymons: super- prefix, twist n.¹ Etymology: < super- prefix + twist n.¹ Compare supertwisted adj. 1. An additional twist in an already twisted structure or thing. In later use: (Biochemistry) such a twist in a helical molecule of DNA (cf. superhelix n.). ΚΠ 1928 Brit. Patent 298,938 2/2 On leaving its bobbin..each thread is twisted on itself, independently of the twist it may have previously received... This super-twist will be the greater in proportion. 1959 U.S. Patent 2,895,288 1 In a modification of this process a rayon yarn is given a super-twist, moistened to set the twist, [etc.]. 1965 Sci. News Let. 19 June 391/2 This reaction, started by DNAase or by a reducing agent such as hydroquinone, allows the super-twist to unwind. 1987 New Scientist 15 Jan. 27/1 The domains undergo a process of ‘supercoiling’ into 400 ‘supertwists’, a process catalysed by an enzyme complex called DNA gyrase. 2005 D. P. Clark Molecular Biol. iv. 90 Gyrase works by cutting both strands of the DNA, introducing a supertwist and rejoining the DNA strands. 2. Electronics. A type of liquid crystal display used in portable computers, mobile phones, etc., in which the plane of polarized light passing through the display is rotated by more than 90 degrees (typically by between 180 and 270 degrees), providing greater contrast than a twisted nematic display. Chiefly attributive. ΚΠ 1985 C. M. Waters et al. in Molecular Crystals & Liquid Crystals 123 304 The comparison with the normal twisted nematic device which has only π/2 twist gives the new device its alternative name of the ‘supertwist device’. 1993 Compute Sept. 89/1 The Nomad's 10-inch LCD (measured diagonally) is a backlit, triple supertwist unit that affords good viewing in all lighting conditions. 2003 S. Mueller Upgrading & Repairing PCs (ed. 14) xv. 855 Thanks to supertwist and triple-supertwist LCDs, today's screens enable you to see the screen clearly from more angles with better contrast and lighting. This is a new entry (OED Third Edition, June 2012; most recently modified version published online March 2022). < n.1928
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