dioptern.

Brit.

/dʌɪˈɒptə/,

/ˈdʌɪɒptə/, U.S.

/ˈˌdaɪˈˌɑptər/

Forms: Also in Latin form dioptra.

Etymology: < French dioptre (1547 in Hatzfeld & Darmesteter), < Latin dioptra, < Greek δίοπτρα an optical instrument for measuring heights, levelling, etc.; compare also Greek δίοπτρον spying-glass, < δι-, δια- through + stem ὀπ- to see + instrumental suffix, -τρα, -τρον.

1. An ancient form of theodolite, or instrument for taking angles.

ΘΚΠ

the world > the earth > earth sciences > geography > map-making > surveying > [noun] > surveying instruments > for measuring angles

theodolite?a1560

topographical instrument?a1560

plain table1607

circumferentor1610

diopter1613

plane table1670

circumferencera1687

graphometer1696

semicircle1701

transit theodolite1824

dioptric1849

planchette1858

theodolite-goniometer1909

gyro-theodolite1950

1613 M. Ridley Short Treat. Magneticall Bodies 112 Make a hole as in a Diopter, that the Sunne may shine in at it.

1641 W. Gascoigne Let. in S. P. Rigaud & S. J. Rigaud Corr. Sci. Men 17th Cent. (1841) (modernized text) I. 51 Two dioptraes..fitted with glasses, hair, and moveable rims.

1851 E. C. Otté tr. A. von Humboldt Cosmos III. 53 Long tubes..employed by Arabian astronomers..to the extremities of which ocular and object diopters were attached.

1857 W. Whewell Hist. Inductive Sci. (ed. 3) I. 354 He wrote..a treatise on the Dioptra..an instrument for taking angles.

2. The index-arm of a graduated circle; = alidade n.

ΘΚΠ

the world > the universe > cosmology > science of observation > astronomical instruments > [noun] > parts of

almuryc1400

alidadea1500

diopter1594

pinnule1594

1594 T. Blundeville Exercises iv. xx. f. 223^v Hauing placed the Diopter of your Astrolabe, at that altitude.

1662 J. Davies tr. A. Olearius Voy. & Trav. Ambassadors 192 I took the Horizon with my Astrolabe, and having put my Dioptra into it, I turn'd my self towards the Sea..and could easily discern it.

a1875 E. H. Knight Pract. Dict. Mech. I. 172/1 To measure an angle with the astrolabe, the latter is placed with its center over the vertex of the angle, and turned until the fixed diopters sight in the direction of one side. The movable strip with its diopters is then sighted in the direction of the other side, and the angle contained between the two strips is read off.

†3. A surgical speculum. Obsolete.

ΘΚΠ

the world > health and disease > healing > medical appliances or equipment > surgical instruments > [noun] > dilator or speculum

tendiculec1425

speculum1598

dilatator1611

dilatatory1611

dilater1634

dilator1688

diopter1706

quadrivalve1852

duck-bill speculum1879

proctoscope1896

the world > health and disease > healing > diagnosis or prognosis > examination > [noun] > by physical means > of specific parts or using specific instruments > specific examining instruments

speculum1598

diopter1706

otoscope1853

stomatoscope1853

laparoscope1855

cardioscope1856

sphygmoscope1856

stereoscope1857

laryngoscope1860

pharyngoscope1861

rhinoscope1861

autolaryngoscope1863

vaginoscope1863

oesophagoscope1868

photophore1871

rectoscope1871

endoscope1872

autoscope1873

glottiscope1876

polyscope1878

duck-bill speculum1879

tracer1882

diaphanoscope1883

gastroscope1888

cystoscope1889

kinetoskotoscope1896

photoscope1896

proctoscope1896

bronchoscope1899

sigmoidoscope1900

arthroscope1925

peritoneoscope1939

toposcope1951

fibrescope1954

mediastinoscope1966

fetoscope1968

angioscope1980

1706 Phillips's New World of Words (new ed.) Dioptra..a Surgeon's Instrument.

1728 E. Chambers Cycl. Dioptra, among Surgeons, is an Instrument whereby one may see into the Matrix, and inspect any Ulcers therein, call'd also Speculum Matricis, and Dilatatorium.

1872 T. G. Thomas Pract. Treat. Dis. Women (ed. 3) 37 If therefore, says Paul of Ægina, the ulceration be within reach, it is detected by the dioptra.

4. An instrument for obtaining drawings of the skull by projections.

ΚΠ

1878 R. T. H. Bartley tr. P. Topinard Anthropol. ii. iii. 269.

5. A unit of measurement for lenses; = dioptric adj. 2.Usually spelt dioptre n. in the U.K.

ΚΠ

1890 G. M. Gould New Med. Dict. 133/1 Diopter or Dioptric.

This entry has not yet been fully updated (first published 1896; most recently modified version published online March 2022).

单词	diopter
释义	dioptern. Brit. /dʌɪˈɒptə/, /ˈdʌɪɒptə/, U.S. /ˈˌdaɪˈˌɑptər/ Forms: Also in Latin form dioptra. Etymology: < French dioptre (1547 in Hatzfeld & Darmesteter), < Latin dioptra, < Greek δίοπτρα an optical instrument for measuring heights, levelling, etc.; compare also Greek δίοπτρον spying-glass, < δι-, δια- through + stem ὀπ- to see + instrumental suffix, -τρα, -τρον. 1. An ancient form of theodolite, or instrument for taking angles. ΘΚΠ the world > the earth > earth sciences > geography > map-making > surveying > [noun] > surveying instruments > for measuring angles theodolite?a1560 topographical instrument?a1560 plain table1607 circumferentor1610 diopter1613 plane table1670 circumferencera1687 graphometer1696 semicircle1701 transit theodolite1824 dioptric1849 planchette1858 theodolite-goniometer1909 gyro-theodolite1950 1613 M. Ridley Short Treat. Magneticall Bodies 112 Make a hole as in a Diopter, that the Sunne may shine in at it. 1641 W. Gascoigne Let. in S. P. Rigaud & S. J. Rigaud Corr. Sci. Men 17th Cent. (1841) (modernized text) I. 51 Two dioptraes..fitted with glasses, hair, and moveable rims. 1851 E. C. Otté tr. A. von Humboldt Cosmos III. 53 Long tubes..employed by Arabian astronomers..to the extremities of which ocular and object diopters were attached. 1857 W. Whewell Hist. Inductive Sci. (ed. 3) I. 354 He wrote..a treatise on the Dioptra..an instrument for taking angles. 2. The index-arm of a graduated circle; = alidade n. ΘΚΠ the world > the universe > cosmology > science of observation > astronomical instruments > [noun] > parts of almuryc1400 alidadea1500 diopter1594 pinnule1594 1594 T. Blundeville Exercises iv. xx. f. 223^v Hauing placed the Diopter of your Astrolabe, at that altitude. 1662 J. Davies tr. A. Olearius Voy. & Trav. Ambassadors 192 I took the Horizon with my Astrolabe, and having put my Dioptra into it, I turn'd my self towards the Sea..and could easily discern it. a1875 E. H. Knight Pract. Dict. Mech. I. 172/1 To measure an angle with the astrolabe, the latter is placed with its center over the vertex of the angle, and turned until the fixed diopters sight in the direction of one side. The movable strip with its diopters is then sighted in the direction of the other side, and the angle contained between the two strips is read off. †3. A surgical speculum. Obsolete. ΘΚΠ the world > health and disease > healing > medical appliances or equipment > surgical instruments > [noun] > dilator or speculum tendiculec1425 speculum1598 dilatator1611 dilatatory1611 dilater1634 dilator1688 diopter1706 quadrivalve1852 duck-bill speculum1879 proctoscope1896 the world > health and disease > healing > diagnosis or prognosis > examination > [noun] > by physical means > of specific parts or using specific instruments > specific examining instruments speculum1598 diopter1706 otoscope1853 stomatoscope1853 laparoscope1855 cardioscope1856 sphygmoscope1856 stereoscope1857 laryngoscope1860 pharyngoscope1861 rhinoscope1861 autolaryngoscope1863 vaginoscope1863 oesophagoscope1868 photophore1871 rectoscope1871 endoscope1872 autoscope1873 glottiscope1876 polyscope1878 duck-bill speculum1879 tracer1882 diaphanoscope1883 gastroscope1888 cystoscope1889 kinetoskotoscope1896 photoscope1896 proctoscope1896 bronchoscope1899 sigmoidoscope1900 arthroscope1925 peritoneoscope1939 toposcope1951 fibrescope1954 mediastinoscope1966 fetoscope1968 angioscope1980 1706 Phillips's New World of Words (new ed.) Dioptra..a Surgeon's Instrument. 1728 E. Chambers Cycl. Dioptra, among Surgeons, is an Instrument whereby one may see into the Matrix, and inspect any Ulcers therein, call'd also Speculum Matricis, and Dilatatorium. 1872 T. G. Thomas Pract. Treat. Dis. Women (ed. 3) 37 If therefore, says Paul of Ægina, the ulceration be within reach, it is detected by the dioptra. 4. An instrument for obtaining drawings of the skull by projections. ΚΠ 1878 R. T. H. Bartley tr. P. Topinard Anthropol. ii. iii. 269. 5. A unit of measurement for lenses; = dioptric adj. 2.Usually spelt dioptre n. in the U.K. ΚΠ 1890 G. M. Gould New Med. Dict. 133/1 Diopter or Dioptric. This entry has not yet been fully updated (first published 1896; most recently modified version published online March 2022). < n.1594
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