trapezoidn.adj.

Brit.

/trəˈpiːzɔɪd/,

/ˈtrapɪzɔɪd/, U.S.

/ˈtræpəˌzɔɪd/

Etymology: < modern Latin trapezoïdēs, < late Greek τραπεζοειδής , neuter τραπεζοειδές table-like (Proclus 450), < τράπεζα table: see -oid suffix. Compare French trapézoïde (1652 in Hatzfeld & Darmesteter).

A. n.

1. Geometry.

a. A quadrilateral figure no two of whose sides are parallel. (Often called by English writers (in 19th cent.) trapezium n.)This is the sense for which Proclus introduced the term τραπεζοειδές; it is retained in French trapézoïde, German trapezoïd, etc. See etymological note to trapezium n.

ΘΚΠ

the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > quadrilateral > irregular > with no parallel sides

trapezoid1706

trapezium1795

1706 Phillips's New World of Words (new ed.) Trapezoid, a Geometrical Figure that has all its four Sides and Angles unequal, and no Sides parallel.

1753 Chambers's Cycl. Suppl. Trapezoid, in geometry, a plane irregular figure, having four sides, no two of which are parallel to each other.

1788 T. Taylor tr. Proclus Philos. & Math. Comm. I. 176 Of non-parallelograms, some have only two parallel sides,..others have none of their sides parallel. And those are called Trapeziums, but these Trapezoids.

1851 R. F. Burton Goa 274 Its shape is a trapezoid, for though quadrilateral, none of its sides are equal or even.

b. With some: A quadrilateral figure having only two sides parallel: = trapezium n. 1b. Now U.S.A misapplication of the term originally peculiar to English.

ΘΚΠ

the world > life > the body > structural parts > sinew, tendon, or ligament > types of sinew, tendon, or ligament > [noun] > of neck

paxwaxa1325

taxwax1712

trapezoid1795

the world > space > shape > angularity > specific angular shape > [noun] > quadrilateral > trapezium

board-form1551

trapezium1570

trapezoid1795

the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > quadrilateral > irregular > with two parallel sides

trapezium1570

trapezoid1795

trapeze1864

1795 C. Hutton Math. & Philos. Dict. II. 611/1 Trapezoid sometimes denotes a trapezium that has two of its sides parallel to each other.

1806 C. Hutton Course Math. (ed. 5) I. 291 A Trapezoid, or Trapezium having two Sides Parallel.

1846 Potts Euclid 45 Sometimes an irregular four-sided figure which has two of its sides parallel, is called a trapezoid.

1879 in Cassell's Techn. Educator ii. 124 If any two of the sides are parallel to each other the figure is called a trapezoid.

1901 T. F. Holgate Elem. Geom. i. 74 If only two sides of a quadrilateral are parallel, the figure is called a trapezoid. If no two sides of a quadrilateral are parallel, the figure is called a trapezium.

1906 Hamilton & Kettle 2nd Geom. Bk. 39 [Here] trapezoid [is used] for quadrilaterals that have one pair of parallel sides.

1925 F. E. Seymour Plane Geom. ii. 103 If the non-parallel sides of a trapezoid are equal, the trapezoid is called an isosceles trapezoid.

1972 Whitaker's Almanack 902/2 Flag [of Kuwait].—Three horizontal stripes of green, white and red, with black trapezoid next to staff.

1975 Sci. Amer. Jan. 110/3 The matrix is stretched to a trapezoid, then the artist copies the picture by filling in the trapezoidal cells.

1977 Monitor (McAllen, Texas) 6 Jan. e–2/4 The Incas apparently adopted many things from the Mollos, of which the trapezoid is only one.

†c. Formerly applied to an irregularly quadrate solid with neither pair of sides parallel. Obsolete.Here -oid appears to have the same sense as in ellipsoid, paraboloid.

ΘΚΠ

the world > relative properties > number > geometry > shape or figure > [noun] > three-dimensional > contained by quadrilaterals

trapezoid1704

trapezohedron1822

1704 J. Harris Lexicon Technicum I Trapezoid is a solid irregular Figure, having four Sides not parallel to one another. [The only sense given.]

1795 in C. Hutton Math. & Philos. Dict. II. 611/1 [as second sense].

2. Anatomy. A bone of the wrist, the second of the distal row of the carpus: so called from its shape. (Also in Latin-Greek form trapezoides; French trapézoïde.)

ΘΚΠ

the world > life > the body > structural parts > bone or bones > bones of arm or leg > bones of arm > [noun] > bones of forearm > bones of wrist

navicular?a1425

navicular bone?a1425

wrist-bone1552

carpus1686

scaphoid bone1741

pisiform bone1753

pisiform1808

trapezoid1828

trapezium1840

unciform1840

scaphoid1846

carpal1854

lunar1854

centrale1870

radiale1870

intermedium1878

lunar bone1887

capitate1889

triquetral bone1913

1828 R. Knox tr. H. Cloquet Syst. Human Anat. 132 The Trapezoides (os multangulum minus), is smaller than the trapezium.

1840 E. Wilson Anatomist's Vade Mecum (1842) 113 When seen from before, it has a quadrilateral form: it is named trapezoid.

1855 L. Holden Human Osteol. 124 The trapezium and trapezoid form a shallow socket for the scaphoid.

B. adj.

a. = trapezoidal adj. (In all the quots. improperly used for trapezial adj.)

ΘΚΠ

the world > space > shape > angularity > specific angular shape > [adjective] > quadrilateral > trapezial

trapezial1681

trapeziform1776

trapezoidal1794

trapezoid1819

trapezate1826

the world > relative properties > number > geometry > shape or figure > [adjective] > two-dimensional > quadrilateral > trapezial

trapezial1681

trapeziform1776

trapezoidal1794

trapezoid1819

1819 G. Samouelle Entomologist's Compend. 195 Thorax trapezoid, broad behind.

1826 W. Kirby & W. Spence Introd. Entomol. IV. 264 Trapezoid... Quadrilateral, with two sides unequal and parallel. Note. We have departed from the more usual definition of trapezoid, ‘An irregular figure whose four sides are not parallel’, because the above is best suited to forms in insects.

1840 E. Wilson Anatomist's Vade Mecum (1842) 124 The internal lateral ligament is a broad and trapezoid layer of ligamentous fibres.

b. Anatomy. trapezoid body: = trapezium n. 2b trapezoid bone: = A. 2 trapezoid ligament (French ligament trapézoïde), the coraco-clavicular adj. at coraco- comb. form ligament. trapezoid line: see quot. 1890.

ΚΠ

1890 J. S. Billings National Med. Dict. (at cited word) T[rapezoid] bone, second bone of distal row of wrist... T. line, a rough ridge for attachment of trapezoid ligament on under surface of clavicle.

1899 T. C. Allbutt et al. Syst. Med. VI. 804 Degeneration of the trapezoid body.

This entry has not yet been fully updated (first published 1914; most recently modified version published online March 2022).

单词	trapezoid
释义	trapezoidn.adj. Brit. /trəˈpiːzɔɪd/, /ˈtrapɪzɔɪd/, U.S. /ˈtræpəˌzɔɪd/ Etymology: < modern Latin trapezoïdēs, < late Greek τραπεζοειδής , neuter τραπεζοειδές table-like (Proclus 450), < τράπεζα table: see -oid suffix. Compare French trapézoïde (1652 in Hatzfeld & Darmesteter). A. n. 1. Geometry. a. A quadrilateral figure no two of whose sides are parallel. (Often called by English writers (in 19th cent.) trapezium n.)This is the sense for which Proclus introduced the term τραπεζοειδές; it is retained in French trapézoïde, German trapezoïd, etc. See etymological note to trapezium n. ΘΚΠ the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > quadrilateral > irregular > with no parallel sides trapezoid1706 trapezium1795 1706 Phillips's New World of Words (new ed.) Trapezoid, a Geometrical Figure that has all its four Sides and Angles unequal, and no Sides parallel. 1753 Chambers's Cycl. Suppl. Trapezoid, in geometry, a plane irregular figure, having four sides, no two of which are parallel to each other. 1788 T. Taylor tr. Proclus Philos. & Math. Comm. I. 176 Of non-parallelograms, some have only two parallel sides,..others have none of their sides parallel. And those are called Trapeziums, but these Trapezoids. 1851 R. F. Burton Goa 274 Its shape is a trapezoid, for though quadrilateral, none of its sides are equal or even. b. With some: A quadrilateral figure having only two sides parallel: = trapezium n. 1b. Now U.S.A misapplication of the term originally peculiar to English. ΘΚΠ the world > life > the body > structural parts > sinew, tendon, or ligament > types of sinew, tendon, or ligament > [noun] > of neck paxwaxa1325 taxwax1712 trapezoid1795 the world > space > shape > angularity > specific angular shape > [noun] > quadrilateral > trapezium board-form1551 trapezium1570 trapezoid1795 the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > quadrilateral > irregular > with two parallel sides trapezium1570 trapezoid1795 trapeze1864 1795 C. Hutton Math. & Philos. Dict. II. 611/1 Trapezoid sometimes denotes a trapezium that has two of its sides parallel to each other. 1806 C. Hutton Course Math. (ed. 5) I. 291 A Trapezoid, or Trapezium having two Sides Parallel. 1846 Potts Euclid 45 Sometimes an irregular four-sided figure which has two of its sides parallel, is called a trapezoid. 1879 in Cassell's Techn. Educator ii. 124 If any two of the sides are parallel to each other the figure is called a trapezoid. 1901 T. F. Holgate Elem. Geom. i. 74 If only two sides of a quadrilateral are parallel, the figure is called a trapezoid. If no two sides of a quadrilateral are parallel, the figure is called a trapezium. 1906 Hamilton & Kettle 2nd Geom. Bk. 39 [Here] trapezoid [is used] for quadrilaterals that have one pair of parallel sides. 1925 F. E. Seymour Plane Geom. ii. 103 If the non-parallel sides of a trapezoid are equal, the trapezoid is called an isosceles trapezoid. 1972 Whitaker's Almanack 902/2 Flag [of Kuwait].—Three horizontal stripes of green, white and red, with black trapezoid next to staff. 1975 Sci. Amer. Jan. 110/3 The matrix is stretched to a trapezoid, then the artist copies the picture by filling in the trapezoidal cells. 1977 Monitor (McAllen, Texas) 6 Jan. e–2/4 The Incas apparently adopted many things from the Mollos, of which the trapezoid is only one. †c. Formerly applied to an irregularly quadrate solid with neither pair of sides parallel. Obsolete.Here -oid appears to have the same sense as in ellipsoid, paraboloid. ΘΚΠ the world > relative properties > number > geometry > shape or figure > [noun] > three-dimensional > contained by quadrilaterals trapezoid1704 trapezohedron1822 1704 J. Harris Lexicon Technicum I Trapezoid is a solid irregular Figure, having four Sides not parallel to one another. [The only sense given.] 1795 in C. Hutton Math. & Philos. Dict. II. 611/1 [as second sense]. 2. Anatomy. A bone of the wrist, the second of the distal row of the carpus: so called from its shape. (Also in Latin-Greek form trapezoides; French trapézoïde.) ΘΚΠ the world > life > the body > structural parts > bone or bones > bones of arm or leg > bones of arm > [noun] > bones of forearm > bones of wrist navicular?a1425 navicular bone?a1425 wrist-bone1552 carpus1686 scaphoid bone1741 pisiform bone1753 pisiform1808 trapezoid1828 trapezium1840 unciform1840 scaphoid1846 carpal1854 lunar1854 centrale1870 radiale1870 intermedium1878 lunar bone1887 capitate1889 triquetral bone1913 1828 R. Knox tr. H. Cloquet Syst. Human Anat. 132 The Trapezoides (os multangulum minus), is smaller than the trapezium. 1840 E. Wilson Anatomist's Vade Mecum (1842) 113 When seen from before, it has a quadrilateral form: it is named trapezoid. 1855 L. Holden Human Osteol. 124 The trapezium and trapezoid form a shallow socket for the scaphoid. B. adj. a. = trapezoidal adj. (In all the quots. improperly used for trapezial adj.) ΘΚΠ the world > space > shape > angularity > specific angular shape > [adjective] > quadrilateral > trapezial trapezial1681 trapeziform1776 trapezoidal1794 trapezoid1819 trapezate1826 the world > relative properties > number > geometry > shape or figure > [adjective] > two-dimensional > quadrilateral > trapezial trapezial1681 trapeziform1776 trapezoidal1794 trapezoid1819 1819 G. Samouelle Entomologist's Compend. 195 Thorax trapezoid, broad behind. 1826 W. Kirby & W. Spence Introd. Entomol. IV. 264 Trapezoid... Quadrilateral, with two sides unequal and parallel. Note. We have departed from the more usual definition of trapezoid, ‘An irregular figure whose four sides are not parallel’, because the above is best suited to forms in insects. 1840 E. Wilson Anatomist's Vade Mecum (1842) 124 The internal lateral ligament is a broad and trapezoid layer of ligamentous fibres. b. Anatomy. trapezoid body: = trapezium n. 2b trapezoid bone: = A. 2 trapezoid ligament (French ligament trapézoïde), the coraco-clavicular adj. at coraco- comb. form ligament. trapezoid line: see quot. 1890. ΚΠ 1890 J. S. Billings National Med. Dict. (at cited word) T[rapezoid] bone, second bone of distal row of wrist... T. line, a rough ridge for attachment of trapezoid ligament on under surface of clavicle. 1899 T. C. Allbutt et al. Syst. Med. VI. 804 Degeneration of the trapezoid body. This entry has not yet been fully updated (first published 1914; most recently modified version published online March 2022). < n.adj.1704
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