paraxialadj.

Brit.

/pəˈraksɪəl/, U.S.

/pəˈræksiəl/

Origin: Formed within English, by derivation. Etymons: para- prefix¹, axial adj.

Etymology: < para- prefix¹ + axial adj.

1. Anatomy and Zoology. Lying alongside, or on each side of, the axis of a body.

ΘΚΠ

the world > life > the body > positions or directions in body > [adjective] > specific

rightOE

lefta1200

lowera1400

furtherc1400

lateral?a1425

sinistera1500

upper1528

anterior?1541

inferior1563

superior1566

oblique1578

high1588

ascendant1611

prone1646

peripherial1653

internal1657

supine1661

peripherical1690

gawk1703

ascending1713

adducent1722

submental1722

adductory1752

subdorsal1783

syntropic18..

atlantal1803

mesiad1803

mesial1803

proximal1803

sternal1803

distal1808

peripheral1808

peripheric1818

ventripetal1819

submedial1825

anteriormostc1826

subvertebral1827

afferent1828

sinistral1828

rostral1834

interganglionic1835

submedian1836

mesian1837

haemal1839

supravaginal1844

neural1846

symmetrical1851

suprameatal1853

paraxial1861

posterial1866

hypaxial1873

postaxial1873

preaxial1873

transmedial1876

transmedian1876

mediad1878

horizontal1881

mesal1881

prosomatic1882

dextrad1883

paramedian1890

prorsal1890

ventro-dorsal1895

midsagittal1898

ventro-axial1902

ventro-posterior1903

ipsilateral1907

parasagittal1907

ventromedial1908

homolateral1910

suprasellar1912

supratemporal1975

1861 J. R. Greene Man. Animal Kingdom II. 228 The oral extremities of the paraxial canal system.

1893 New Sydenham Soc. Lexicon Paraxial muscles, the muscles developed by the side of the vertebral column.

1908 Philos. Trans. (Royal Soc.) B. 199 69 In them [sc. photomicrographs] the paraxial region of the embryonic area is even more sharply defined than in the foregoing cases.

1995 Proc. National Acad. Sci. U.S.A. 92 2254 Cells isolated from somites I–V..or from unsegmented paraxial mesoderm did not give rise to any β-gal⁺ clones.

2. Optics. Situated close to the axis of an optical system, and (if linear, as a ray) virtually parallel to it; of or relating to such a region of an optical system.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > light > emission of light, radiation > [adjective] > on or close to axis

paraxial1906

on-axis1952

1906 H. D. Taylor Syst. Appl. Optics iv. 55 The ultimate or paraxial rays.

1934 W. H. A. Fincham Optics v. 83 For light in the paraxial region the angles of incidence and refraction will be very small.

1974 W. T. Welford Aberrations Symmetr. Optical Syst. iii. 17 We..define the domain of paraxial or Gaussian optics to be close enough to the axis to ensure that all terms of higher order of magnitude than quadratic in x and y are to be neglected.

1994 Ophthalmol. & Visual Sci. 71 282 The matrix method of tracing a paraxial ray through a coaxial optical system that contains spherical refracting elements requires a 2×2 system matrix.

This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).

单词	paraxial
释义	paraxialadj. Brit. /pəˈraksɪəl/, U.S. /pəˈræksiəl/ Origin: Formed within English, by derivation. Etymons: para- prefix¹, axial adj. Etymology: < para- prefix¹ + axial adj. 1. Anatomy and Zoology. Lying alongside, or on each side of, the axis of a body. ΘΚΠ the world > life > the body > positions or directions in body > [adjective] > specific rightOE lefta1200 lowera1400 furtherc1400 lateral?a1425 sinistera1500 upper1528 anterior?1541 inferior1563 superior1566 oblique1578 high1588 ascendant1611 prone1646 peripherial1653 internal1657 supine1661 peripherical1690 gawk1703 ascending1713 adducent1722 submental1722 adductory1752 subdorsal1783 syntropic18.. atlantal1803 mesiad1803 mesial1803 proximal1803 sternal1803 distal1808 peripheral1808 peripheric1818 ventripetal1819 submedial1825 anteriormostc1826 subvertebral1827 afferent1828 sinistral1828 rostral1834 interganglionic1835 submedian1836 mesian1837 haemal1839 supravaginal1844 neural1846 symmetrical1851 suprameatal1853 paraxial1861 posterial1866 hypaxial1873 postaxial1873 preaxial1873 transmedial1876 transmedian1876 mediad1878 horizontal1881 mesal1881 prosomatic1882 dextrad1883 paramedian1890 prorsal1890 ventro-dorsal1895 midsagittal1898 ventro-axial1902 ventro-posterior1903 ipsilateral1907 parasagittal1907 ventromedial1908 homolateral1910 suprasellar1912 supratemporal1975 1861 J. R. Greene Man. Animal Kingdom II. 228 The oral extremities of the paraxial canal system. 1893 New Sydenham Soc. Lexicon Paraxial muscles, the muscles developed by the side of the vertebral column. 1908 Philos. Trans. (Royal Soc.) B. 199 69 In them [sc. photomicrographs] the paraxial region of the embryonic area is even more sharply defined than in the foregoing cases. 1995 Proc. National Acad. Sci. U.S.A. 92 2254 Cells isolated from somites I–V..or from unsegmented paraxial mesoderm did not give rise to any β-gal⁺ clones. 2. Optics. Situated close to the axis of an optical system, and (if linear, as a ray) virtually parallel to it; of or relating to such a region of an optical system. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > emission of light, radiation > [adjective] > on or close to axis paraxial1906 on-axis1952 1906 H. D. Taylor Syst. Appl. Optics iv. 55 The ultimate or paraxial rays. 1934 W. H. A. Fincham Optics v. 83 For light in the paraxial region the angles of incidence and refraction will be very small. 1974 W. T. Welford Aberrations Symmetr. Optical Syst. iii. 17 We..define the domain of paraxial or Gaussian optics to be close enough to the axis to ensure that all terms of higher order of magnitude than quadratic in x and y are to be neglected. 1994 Ophthalmol. & Visual Sci. 71 282 The matrix method of tracing a paraxial ray through a coaxial optical system that contains spherical refracting elements requires a 2×2 system matrix. This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022). < adj.1861
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