perpendicularityn.

Brit.

/ˌpəːp(ə)nˌdɪkjᵿˈlarᵻti/, U.S.

/ˌpərpənˌdɪkjəˈlɛrədi/

Forms: 1500s perpendicularitie, 1600s– perpendicularity.

Origin: Formed within English, by derivation. Etymons: perpendicular adj., -ity suffix.

Etymology: < perpendicular adj. + -ity suffix. Compare post-classical Latin perpendicularitas (1267 in a British source), Middle French, French perpendicularité (1575), Italian perpendicularità (1561).

1. Vertical position or direction, verticality; upright bearing or posture; the state or condition of rising or appearing to rise vertically; extreme steepness.

ΘΚΠ

the world > space > relative position > vertical position > [noun]

perpendicularity1589

upright1683

perpendicular1787

the vertical1834

1589 G. Puttenham Arte Eng. Poesie ii. x. 73 In buildings of stone or bricke the mason giueth a band..to hold in the worke fast and maintaine the perpendicularitie of the wall.

1664 H. Power Exper. Philos. ii. 110 Pendents..multiply their undulations before they rest in their desired Perpendicularity.

1762 Philos. Trans. 1761 (Royal Soc.) 52 42 The column supported its perpendicularity near a quarter of an hour.

1799 R. Southey Let. Aug. in C. C. Southey Life & Corr. R. Southey (1850) II. 22 Ascending from Lynmouth up a road of serpentining perpendicularity.

1849 J. H. Parker Introd. Study Gothic Archit. v. 183 Perpendicularity is..the characteristic of these windows.

1874 T. Hardy Far from Madding Crowd I. xviii. 200 His square-framed perpendicularity showed more fully now than in the crowd and bustle of the market-house.

1926 S. Morison Type Designs 31 The general note of ‘modern’ is that of extreme precision and a certain perpendicularity.

2000 R. King Brunelleschi's Dome (2001) x. 84 For checking the perpendicularity of walls, for example, they used plumb-lines.

2. Chiefly Science and Engineering. Position or direction at right angles to a given line, surface, or plane.

ΘΚΠ

the world > space > relative position > position at right angles to something > [noun]

perpendicularitya1652

squareness1796

a1652 S. Foster Elliptical Horologiography (1654) 99 It must lie perpendicular to A B..and must have respect (in this perpendicularity) to the point C.

1725 I. Watts Logick i. ii. §3 The perpendicularity of these lines to each other, is the difference of a right angle.

1841 J. R. Young Math Diss. ii. 73 They preserve their perpendicularity to one another.

1872 R. A. Proctor Ess. Astron. xxv. 321 Perpendicularity of intersection.

1972 M. Kline Math. Thought iv. 91 Perpendicularity holds only for right circular cones or when the plane of ABC is perpendicular to the base of a scalene cone.

2000 Manuf. Engin. (Nexis) May 136 The perpendicularity of the axes relative to one another must be measured.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	perpendicularity
释义	perpendicularityn. Brit. /ˌpəːp(ə)nˌdɪkjᵿˈlarᵻti/, U.S. /ˌpərpənˌdɪkjəˈlɛrədi/ Forms: 1500s perpendicularitie, 1600s– perpendicularity. Origin: Formed within English, by derivation. Etymons: perpendicular adj., -ity suffix. Etymology: < perpendicular adj. + -ity suffix. Compare post-classical Latin perpendicularitas (1267 in a British source), Middle French, French perpendicularité (1575), Italian perpendicularità (1561). 1. Vertical position or direction, verticality; upright bearing or posture; the state or condition of rising or appearing to rise vertically; extreme steepness. ΘΚΠ the world > space > relative position > vertical position > [noun] perpendicularity1589 upright1683 perpendicular1787 the vertical1834 1589 G. Puttenham Arte Eng. Poesie ii. x. 73 In buildings of stone or bricke the mason giueth a band..to hold in the worke fast and maintaine the perpendicularitie of the wall. 1664 H. Power Exper. Philos. ii. 110 Pendents..multiply their undulations before they rest in their desired Perpendicularity. 1762 Philos. Trans. 1761 (Royal Soc.) 52 42 The column supported its perpendicularity near a quarter of an hour. 1799 R. Southey Let. Aug. in C. C. Southey Life & Corr. R. Southey (1850) II. 22 Ascending from Lynmouth up a road of serpentining perpendicularity. 1849 J. H. Parker Introd. Study Gothic Archit. v. 183 Perpendicularity is..the characteristic of these windows. 1874 T. Hardy Far from Madding Crowd I. xviii. 200 His square-framed perpendicularity showed more fully now than in the crowd and bustle of the market-house. 1926 S. Morison Type Designs 31 The general note of ‘modern’ is that of extreme precision and a certain perpendicularity. 2000 R. King Brunelleschi's Dome (2001) x. 84 For checking the perpendicularity of walls, for example, they used plumb-lines. 2. Chiefly Science and Engineering. Position or direction at right angles to a given line, surface, or plane. ΘΚΠ the world > space > relative position > position at right angles to something > [noun] perpendicularitya1652 squareness1796 a1652 S. Foster Elliptical Horologiography (1654) 99 It must lie perpendicular to A B..and must have respect (in this perpendicularity) to the point C. 1725 I. Watts Logick i. ii. §3 The perpendicularity of these lines to each other, is the difference of a right angle. 1841 J. R. Young Math Diss. ii. 73 They preserve their perpendicularity to one another. 1872 R. A. Proctor Ess. Astron. xxv. 321 Perpendicularity of intersection. 1972 M. Kline Math. Thought iv. 91 Perpendicularity holds only for right circular cones or when the plane of ABC is perpendicular to the base of a scalene cone. 2000 Manuf. Engin. (Nexis) May 136 The perpendicularity of the axes relative to one another must be measured. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1589
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