subtensen.

Brit.

/səbˈtɛns/, U.S.

/səbˈtɛns/

Origin: A borrowing from Latin. Etymons: Latin subtensa, subtendere.

Etymology: < post-classical Latin subtensa (1608 in the passage translated in quot. 1614 at main sense), use as noun (short for subtensa linea subtending line) of feminine past participle of classical Latin subtendere subtend v. Compare slightly earlier subtention n., and also earlier subtending adj.

Geometry.

A line subtended by an angle; an angle subtended by a line at a point.In quot. 1614: a chord of a circle (as notionally subtended by the centre of the circle). In quot. 1678: the hypotenuse of a right-angled triangle (as notionally subtended by the right angle).

ΘΚΠ

the world > relative properties > number > geometry > line > [noun] > subtending

subtendent1570

subtense1614

the world > relative properties > number > geometry > line > [noun] > chord

cord1551

chord1570

string1594

subtention1610

subtense1614

ordinate1676

inscript1695

supplemental chord1760

string-line1897

1614 R. Handson tr. B. Pitiscus Trigonom. ii. 31 A subtense [L. Subtensa] is a right line, inscribed in a Circle, dividing the whole Circle into 2. Segments.

1656 tr. T. Hobbes Elements Philos. ii. xiv. 141 The Subtenses of equal Angles in different Circles..are to one another as the Arches which they subtend.

1678 R. Cudworth True Intellect. Syst. Universe i. iv. 653 Nor doth every one, who hath an Idea of a Rectangular Triangle, presently understand, that the Square of the Subtense, is Equal to the Squares of both the Sides.

1713 W. Derham Physico-theol. i. iv. 30 The whole Diameter of the Orb, viz. 20000, made the Subtense but of one Minute to one of the fixt Stars.

1803 Philos. Trans. (Royal Soc.) 93 396 The total extent of the arch is about 15°, having half of its subtense on each side zero.

1922 Nature 27 May 679/2 The best bisections were made with a subtense of 15° to 12°.

2002 M. Katz Introd. Geom. Optics xvii. 242 Bring it closer to the eye until it blurs. The demand on accommodation increases, but so does the subtense of the letter.

Compounds

Surveying. attributive. Designating a method of tacheometry in which the distance of a staff from the observer is inferred from the angle subtended at the observer by the separation of two marks on the staff; relating to this method.

ΚΠ

1875 H. R. Thuillier Man. Surv. India (ed. 3) ii. iii. 136 If an instrument of the kind is available, set up the great theodolite and the subtense-theodolite.

1899 in W. G. Bligh Notes Instruments Engin. Field-work v. 102 If the staff readings are carefully taken, distances can be ‘set-out’ by this ‘subtense’ method with at least as much accuracy as best chaining.

1940 Geogr. Jrnl. 95 50 In one day a short base was measured by the subtense method and extended to nearly a mile.

2009 U.S. Army Map Reading & Navigation (U.S. Dept. Army) v. 5-8 The subtense method is a fast method of determining distance and yields.

This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022).

单词	subtense
释义	subtensen. Brit. /səbˈtɛns/, U.S. /səbˈtɛns/ Origin: A borrowing from Latin. Etymons: Latin subtensa, subtendere. Etymology: < post-classical Latin subtensa (1608 in the passage translated in quot. 1614 at main sense), use as noun (short for subtensa linea subtending line) of feminine past participle of classical Latin subtendere subtend v. Compare slightly earlier subtention n., and also earlier subtending adj. Geometry. A line subtended by an angle; an angle subtended by a line at a point.In quot. 1614: a chord of a circle (as notionally subtended by the centre of the circle). In quot. 1678: the hypotenuse of a right-angled triangle (as notionally subtended by the right angle). ΘΚΠ the world > relative properties > number > geometry > line > [noun] > subtending subtendent1570 subtense1614 the world > relative properties > number > geometry > line > [noun] > chord cord1551 chord1570 string1594 subtention1610 subtense1614 ordinate1676 inscript1695 supplemental chord1760 string-line1897 1614 R. Handson tr. B. Pitiscus Trigonom. ii. 31 A subtense [L. Subtensa] is a right line, inscribed in a Circle, dividing the whole Circle into 2. Segments. 1656 tr. T. Hobbes Elements Philos. ii. xiv. 141 The Subtenses of equal Angles in different Circles..are to one another as the Arches which they subtend. 1678 R. Cudworth True Intellect. Syst. Universe i. iv. 653 Nor doth every one, who hath an Idea of a Rectangular Triangle, presently understand, that the Square of the Subtense, is Equal to the Squares of both the Sides. 1713 W. Derham Physico-theol. i. iv. 30 The whole Diameter of the Orb, viz. 20000, made the Subtense but of one Minute to one of the fixt Stars. 1803 Philos. Trans. (Royal Soc.) 93 396 The total extent of the arch is about 15°, having half of its subtense on each side zero. 1922 Nature 27 May 679/2 The best bisections were made with a subtense of 15° to 12°. 2002 M. Katz Introd. Geom. Optics xvii. 242 Bring it closer to the eye until it blurs. The demand on accommodation increases, but so does the subtense of the letter. Compounds Surveying. attributive. Designating a method of tacheometry in which the distance of a staff from the observer is inferred from the angle subtended at the observer by the separation of two marks on the staff; relating to this method. ΚΠ 1875 H. R. Thuillier Man. Surv. India (ed. 3) ii. iii. 136 If an instrument of the kind is available, set up the great theodolite and the subtense-theodolite. 1899 in W. G. Bligh Notes Instruments Engin. Field-work v. 102 If the staff readings are carefully taken, distances can be ‘set-out’ by this ‘subtense’ method with at least as much accuracy as best chaining. 1940 Geogr. Jrnl. 95 50 In one day a short base was measured by the subtense method and extended to nearly a mile. 2009 U.S. Army Map Reading & Navigation (U.S. Dept. Army) v. 5-8 The subtense method is a fast method of determining distance and yields. This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022). < n.1614
随便看	mangaian mangal mangals mangan mangan- mangan-amphibole manganamphibole manganapatite manganate manganates manganaxinite manganblende manganbrucite manganchlorite mangancolumbite manganeisen manganesane manganesate manganese manganese alum manganese bister manganese blende manganese bronze manganese brown manganese chloride