point anglen.

Brit.

/ˈpɔɪnt ˌaŋɡl/, U.S.

/ˈpɔɪnt ˌæŋɡ(ə)l/

Origin: Formed within English, by compounding. Etymons: point n.¹, angle n.²

Etymology: < point n.¹ + angle n.²

The angle at a vertex of a solid body; spec. (a) the angle between two diametrically opposite edges or surfaces at the tip of a tool; (b) Dentistry the angle formed at the junction of three tooth surfaces or three cavity walls.

ΘΚΠ

society > occupation and work > equipment > tool > parts of tools generally > [noun] > other parts

neck?a1425

buttc1425

cheek1487

wing1577

face1601

ear1678

wood1683

strig1703

thumb-piece1760

jaws1789

crown1796

lug1833

sprig1835

point angle1869

bulb1885

nosepiece1983

the world > health and disease > healing > dentistry > [noun] > parts of artificial cavity, etc.

anchorage1859

undercut1892

point angle1908

1869 C. Boutell tr. J. P. Lacombe Arms & Armour iv. 67 The blade [of the Roman sword] was straight..and cut at an obtuse angle to form the point. In process of time this point-angle becomes more and more acute.

1908 G. V. Black Work on Operative Dentistry II. 9 All point angles are formed by the junction of three walls at a point, and are named by joining the names of the walls forming the angle. They are, therefore, named in three terms.

1919 G. W. Burley Machine & Fitting Shop Pract. II. v. 142 The standard point-angle of lathe centres is 60° for small and medium-sized work-pieces.

1950 P. Gates in A. W. Judge Machine Tools & Operations I. iv. 149 When drilling soft or ductile materials, drills ground with a smaller point angle tend to throw up considerable burrs on the back of the work.

1973 W. W. Howard Rev. Operative Dentistry i. 9 Point angles are named for the line angles that form them.

2003 Tooling & Production (Nexis) 1 May 46 The point is ground and split in one setup and point angles can be set from 80 to 140 degrees.

This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).

单词	point angle
释义	point anglen. Brit. /ˈpɔɪnt ˌaŋɡl/, U.S. /ˈpɔɪnt ˌæŋɡ(ə)l/ Origin: Formed within English, by compounding. Etymons: point n.¹, angle n.² Etymology: < point n.¹ + angle n.² The angle at a vertex of a solid body; spec. (a) the angle between two diametrically opposite edges or surfaces at the tip of a tool; (b) Dentistry the angle formed at the junction of three tooth surfaces or three cavity walls. ΘΚΠ society > occupation and work > equipment > tool > parts of tools generally > [noun] > other parts neck?a1425 buttc1425 cheek1487 wing1577 face1601 ear1678 wood1683 strig1703 thumb-piece1760 jaws1789 crown1796 lug1833 sprig1835 point angle1869 bulb1885 nosepiece1983 the world > health and disease > healing > dentistry > [noun] > parts of artificial cavity, etc. anchorage1859 undercut1892 point angle1908 1869 C. Boutell tr. J. P. Lacombe Arms & Armour iv. 67 The blade [of the Roman sword] was straight..and cut at an obtuse angle to form the point. In process of time this point-angle becomes more and more acute. 1908 G. V. Black Work on Operative Dentistry II. 9 All point angles are formed by the junction of three walls at a point, and are named by joining the names of the walls forming the angle. They are, therefore, named in three terms. 1919 G. W. Burley Machine & Fitting Shop Pract. II. v. 142 The standard point-angle of lathe centres is 60° for small and medium-sized work-pieces. 1950 P. Gates in A. W. Judge Machine Tools & Operations I. iv. 149 When drilling soft or ductile materials, drills ground with a smaller point angle tend to throw up considerable burrs on the back of the work. 1973 W. W. Howard Rev. Operative Dentistry i. 9 Point angles are named for the line angles that form them. 2003 Tooling & Production (Nexis) 1 May 46 The point is ground and split in one setup and point angles can be set from 80 to 140 degrees. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < n.1869
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