spring bown.

Brit.

/ˈsprɪŋ ˌbaʊ/, U.S.

/ˈsprɪŋ ˌbaʊ/

Origin: Formed within English, by compounding. Etymons: spring v.¹, bow n.¹; spring n.¹, bow n.¹

Etymology: Partly < spring v.¹ + bow n.¹, and partly < spring n.¹ + bow n.¹

†1. Geometry. Perhaps: an arc whose curvature is not uniform. Obsolete. rare.

ΚΠ

1752 W. Halfpenny Geom., Theoret. & Pract. 38 (heading) To describe three different Arches, whose Curves are mix'd like that of a Spring-Bow.

2. A concealed bow and arrow serving as an animal trap and equipped with a mechanism to fire the arrow when a tripwire or the like is moved.

ΚΠ

1780 W. Tooke tr. J. G. Georgi Russia I. 162 A little hedge..behind which they [sc. the Vogouls of Finland] set their traps, and place spring bows and spring guns that kill the game as soon as the bait is touched.

1854 C. Knight Eng. Cycl.: Nat. Hist. II. 769 A kind of spring-bow was formerly laid in its way, and discharged a poisoned arrow, generally with fatal effect, when the animal came in contact with a cord stretched across its path.

1912 J. Shakespear Lushei Kuki Clans ii. iv. 196 Tigers are also killed by spring bows with poisoned arrows set in the jungles.

2007 C. E. Grayson et al. Trad. Archery from Six Continents iv. 100 The crude wooden self bow is part of a spring-bow trap; the bow is placed on a stock with a trip string and armed with poisoned arrows.

3. A compass in which the legs are joined by a flexible bow-shaped bar or plate rather than a hinge. Cf. bow-compass n. 1. More fully spring bow dividers.

ΘΚΠ

society > communication > representation > a plastic or graphic representation > graphic representation > drawing plans or diagrams > [noun] > drawing instruments > for circles

compassa1387

shank1587

beam-compass1785

bow-compass1796

bow-pen1869

pencil arm1884

spring bow1998

1847 Price List (E. M. Clarke) 1 in F. W. Simms Treat. Principal Math. Drawing Instruments (ed. 3) Spring-bow Dividers, ditto Pen, ditto Pencil, with screw motion, the screw moving in a slot.

1895 Army & Navy Co-op. Soc. Price List 686 Spring Bows, set of three, Ink, Pencil, and Divider, in case.

1964 G. Baker Scale Drawing 31 Spring-bows do not have knee-joints because the angle of working is so small as not to matter.

1998 G. L'E. Turner Sci. Instruments 81/2 A typical set of drawing instruments includes..spring bows for small circles.

2010 N. Swager Secrets of Speed 109/3 Use a pair of spring bow dividers to measure the clearance between the valve head and the relief.

This entry has been updated (OED Third Edition, September 2017; most recently modified version published online March 2022).

单词	spring bow
释义	spring bown. Brit. /ˈsprɪŋ ˌbaʊ/, U.S. /ˈsprɪŋ ˌbaʊ/ Origin: Formed within English, by compounding. Etymons: spring v.¹, bow n.¹; spring n.¹, bow n.¹ Etymology: Partly < spring v.¹ + bow n.¹, and partly < spring n.¹ + bow n.¹ †1. Geometry. Perhaps: an arc whose curvature is not uniform. Obsolete. rare. ΚΠ 1752 W. Halfpenny Geom., Theoret. & Pract. 38 (heading) To describe three different Arches, whose Curves are mix'd like that of a Spring-Bow. 2. A concealed bow and arrow serving as an animal trap and equipped with a mechanism to fire the arrow when a tripwire or the like is moved. ΚΠ 1780 W. Tooke tr. J. G. Georgi Russia I. 162 A little hedge..behind which they [sc. the Vogouls of Finland] set their traps, and place spring bows and spring guns that kill the game as soon as the bait is touched. 1854 C. Knight Eng. Cycl.: Nat. Hist. II. 769 A kind of spring-bow was formerly laid in its way, and discharged a poisoned arrow, generally with fatal effect, when the animal came in contact with a cord stretched across its path. 1912 J. Shakespear Lushei Kuki Clans ii. iv. 196 Tigers are also killed by spring bows with poisoned arrows set in the jungles. 2007 C. E. Grayson et al. Trad. Archery from Six Continents iv. 100 The crude wooden self bow is part of a spring-bow trap; the bow is placed on a stock with a trip string and armed with poisoned arrows. 3. A compass in which the legs are joined by a flexible bow-shaped bar or plate rather than a hinge. Cf. bow-compass n. 1. More fully spring bow dividers. ΘΚΠ society > communication > representation > a plastic or graphic representation > graphic representation > drawing plans or diagrams > [noun] > drawing instruments > for circles compassa1387 shank1587 beam-compass1785 bow-compass1796 bow-pen1869 pencil arm1884 spring bow1998 1847 Price List (E. M. Clarke) 1 in F. W. Simms Treat. Principal Math. Drawing Instruments (ed. 3) Spring-bow Dividers, ditto Pen, ditto Pencil, with screw motion, the screw moving in a slot. 1895 Army & Navy Co-op. Soc. Price List 686 Spring Bows, set of three, Ink, Pencil, and Divider, in case. 1964 G. Baker Scale Drawing 31 Spring-bows do not have knee-joints because the angle of working is so small as not to matter. 1998 G. L'E. Turner Sci. Instruments 81/2 A typical set of drawing instruments includes..spring bows for small circles. 2010 N. Swager Secrets of Speed 109/3 Use a pair of spring bow dividers to measure the clearance between the valve head and the relief. This entry has been updated (OED Third Edition, September 2017; most recently modified version published online March 2022). < n.1752
随便看	to dispatch the life of to dispatch the world to dispend land to dispense with to display promise to disport oneself to dispose of to dispose upon or on to dispose with to dispute the pas to dissect out to dissolve in ecstasy to distil over to distinguish far to distinguish of to distinguish upon to distract of one's wit to distract the attention to distract the mind to distraction to dit one's ears to dit one's ears occasionally ear to ditch in to ditch out to ditch up