ellipsen.

/ɛˈlɪps/

Etymology: < Greek ἔλλειψις, noun of action < ἐλλείπειν to come short. (In the case of the ellipse regarded as a conic section the inclination of the cutting plane to the base ‘comes short of’, as in the case of the hyperbola it exceeds, the inclination of the side of the cone.)Not in Johnson, Todd, or Richardson (1836); for early examples of the plural ellipses see ellipsis n.

1. A plane closed curve (in popular language a regular oval), which may be defined in various ways: (a) considered as a conic section; the figure produced when a cone is cut obliquely by a plane making a smaller angle with the base than the side of the cone makes with the base; (b) a curve in which the sum of the distances of any point from the two foci is a constant quantity; (c) a curve in which the focal distance of any point bears to its distance from the directrix a constant ratio smaller than unity.The planetary orbits being (approximately) elliptical, ellipse is sometimes used for ‘orbit’ (of a planet).

ΘΚΠ

the world > relative properties > number > geometry > curve > [noun] > conic section > ellipse

egg-form1551

ellipsis1570

oval1570

ellipse1753

the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > closed curve > ellipse

egg-form1551

ellipsis1570

ellipse1753

1753 Chambers's Cycl. Suppl. at Ellipsis [The form ellipse is used throughout; the Cycl. 1751 has only ellipsis].

1815 C. Hutton Math. & Philos. Dict. Ellipse or Ellipsis.

1846 Ld. Tennyson Golden Year in Poems (ed. 4) II. 89 The dark Earth follows wheel'd in her ellipse.

1868 W. Lockyer & J. N. Lockyer tr. A. Guillemin Heavens (ed. 3) 120 A circle seen obliquely or perspectively shows the form of an ellipse.

1880 C. Darwin & F. Darwin Power of Movement in Plants 1 Other irregular ellipses..are successively described.

2. transferred. An object or figure bounded by an ellipse. Also figurative.

ΘΚΠ

the world > space > shape > curvature > roundness > [noun] > oval or elliptical quality > oval or elliptical object

oval1632

ellipse1850

1850 R. P. Thomas tr. P. Cazeaux Theoret. & Pract. Treat. Midwifery 36 The abdominal strait has been..compared to an ellipse.

1869 E. Dunkin Midnight Sky 163 An ellipse of small stars.

3. Grammar. = ellipsis n. 2. Somewhat rare.

ΘΚΠ

society > leisure > the arts > literature > style of language or writing > figure of speech > figures of structure or thought > [noun] > ellipsis

eclipsis1538

ellipsis1621

ellipse1843

1843–83 H. G. Liddell & R. Scott Greek Lex. s.v. Ἔλλειψις.

1886 H. J. Roby Gram. Latin Lang. (ed. 5) II. Index 511.

This entry has not yet been fully updated (first published 1891; most recently modified version published online March 2022).

单词	ellipse
释义	ellipsen. /ɛˈlɪps/ Etymology: < Greek ἔλλειψις, noun of action < ἐλλείπειν to come short. (In the case of the ellipse regarded as a conic section the inclination of the cutting plane to the base ‘comes short of’, as in the case of the hyperbola it exceeds, the inclination of the side of the cone.)Not in Johnson, Todd, or Richardson (1836); for early examples of the plural ellipses see ellipsis n. 1. A plane closed curve (in popular language a regular oval), which may be defined in various ways: (a) considered as a conic section; the figure produced when a cone is cut obliquely by a plane making a smaller angle with the base than the side of the cone makes with the base; (b) a curve in which the sum of the distances of any point from the two foci is a constant quantity; (c) a curve in which the focal distance of any point bears to its distance from the directrix a constant ratio smaller than unity.The planetary orbits being (approximately) elliptical, ellipse is sometimes used for ‘orbit’ (of a planet). ΘΚΠ the world > relative properties > number > geometry > curve > [noun] > conic section > ellipse egg-form1551 ellipsis1570 oval1570 ellipse1753 the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > closed curve > ellipse egg-form1551 ellipsis1570 ellipse1753 1753 Chambers's Cycl. Suppl. at Ellipsis [The form ellipse is used throughout; the Cycl. 1751 has only ellipsis]. 1815 C. Hutton Math. & Philos. Dict. Ellipse or Ellipsis. 1846 Ld. Tennyson Golden Year in Poems (ed. 4) II. 89 The dark Earth follows wheel'd in her ellipse. 1868 W. Lockyer & J. N. Lockyer tr. A. Guillemin Heavens (ed. 3) 120 A circle seen obliquely or perspectively shows the form of an ellipse. 1880 C. Darwin & F. Darwin Power of Movement in Plants 1 Other irregular ellipses..are successively described. 2. transferred. An object or figure bounded by an ellipse. Also figurative. ΘΚΠ the world > space > shape > curvature > roundness > [noun] > oval or elliptical quality > oval or elliptical object oval1632 ellipse1850 1850 R. P. Thomas tr. P. Cazeaux Theoret. & Pract. Treat. Midwifery 36 The abdominal strait has been..compared to an ellipse. 1869 E. Dunkin Midnight Sky 163 An ellipse of small stars. 3. Grammar. = ellipsis n. 2. Somewhat rare. ΘΚΠ society > leisure > the arts > literature > style of language or writing > figure of speech > figures of structure or thought > [noun] > ellipsis eclipsis1538 ellipsis1621 ellipse1843 1843–83 H. G. Liddell & R. Scott Greek Lex. s.v. Ἔλλειψις. 1886 H. J. Roby Gram. Latin Lang. (ed. 5) II. Index 511. This entry has not yet been fully updated (first published 1891; most recently modified version published online March 2022). < n.1753
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