discontinuousadj.

Brit.

/ˌdɪskənˈtɪnjʊəs/, U.S.

/ˌdɪskənˈtɪnjʊəs/

Origin: A borrowing from Latin. Etymon: Latin discontinuus.

Etymology: < post-classical Latin discontinuus not continuous, interrupted (from 13th cent. in British sources; from 15th cent. in continental sources) < classical Latin dis- dis- prefix + continuus (see continuous adj.). Compare Middle French, French discontinu (a1372; 1784 or earlier in the specific mathematical use designating a function), Spanish discontinuo (1437), Italian discontinuo (a1519). Compare earlier discontinual adj., discontinuate adj.

1. Not continuous in time; occurring or existing at intervals; intermittent.

ΘΚΠ

the world > relative properties > order > order, sequence, or succession > continuity or uninterruptedness > discontinuity or interrupted condition > [adjective]

discontinuala1398

discontinueda1398

discretea1398

discontinualc1450

uncontinued1585

disjunct1594

discontinued1624

discontinuate1625

discontinuated1634

discontinuous1645

infracted1727

uncontinuous1846

inarticulate1852

incontinuous1862

saccadic1936

1645 L. Sarson Anal. I. Timoth. I. 15 119 The affirmative part is most probable; otherwise sacred Chronologie (in which I cannot suspect that there is any hiatus) should be discontinuous.

1742 J. Martyn & E. Chambers tr. Philos. Hist. & Mem. Royal Acad. Sci. Paris V. 139 When the petrefaction of any mass has been discontinuous.

1794 Freemason's Mag. June 431 Their progress must have been necessarily slow, and discontinuous.

1832 Nat. Philos. (Libr. Useful Knowl.) II. Electro-magnetism xi. §176 When the conductors are imperfect, the currents are discontinuous.

1864 H. Spencer Princ. Biol. I. §50. 137 Of multiaxial growth that is discontinuous, a familiar instance among plants exists in the common strawberry.

1884 Law Rep.: Chancery Div. 26 442 A right of way..is a discontinuous easement, because a man is not always walking in and out of his front door.

1917 Industr. Efficiency & Fatigue in Brit. Munition Factories (U.S. Dept. Labor, Bureau of Labor Statistics) 17 Discontinuous night work, in which employees pass into the night shift at regular intervals.

1963 A. Sharp Anc. Voyagers in Indonesia i. 26 Contact even within these islands was limited and discontinuous.

2001 S. T. Asma Stuffed Animals & Pickled Heads v. 200 The early mutationists believed..evolution might happen by discontinuous leaps rather than very slight variations.

†2. poetic. Producing discontinuity between the parts of something; (hence) torn apart; open, gaping. Obsolete.

ΘΚΠ

the world > space > relative position > condition of being open or not closed > [adjective] > wide open or gaping

yawningc893

wideOE

wide open?c1225

gap-wide1582

gaping1594

mouthed1609

patulous1616

wide-opened1635

dehiscent1649

discontinuous1667

patulent1712

hiant1800

yawn-mouthed1861

1667 J. Milton Paradise Lost vi. 329 So sore The griding sword with discontinuous wound Pass'd through him.

1701 J. Philips Splendid Shilling (1705) 5 A horrid Chasm disclose, with Orifice Wide discontinuous.

a1765 W. Dunkin Poet. Wks. (1769) I. 482 Parti-colour'd robes, a-gape with rents Wide, discontinuous.

3. Of a substance or object: having breaks or gaps in continuity; consisting of distinct parts; (of two or more objects) not contiguous or joined together; discrete.

ΚΠ

1669 ‘E. Philalethes’ Secrets Reveal'd 108 Sometimes it will seem as if it were all discontinuous in grain, and then again it will grow into one Mass again.

1682 N. Grew Anat. Plants i. iii. 22 The Pores of the Pith..are all alike discontinuous.

1719 N. Rowe tr. Lucan Pharsalia iii. 113 Wide-spread the discontinuous Ruins lie.

1750 tr. C. Leonardus Mirror of Stones 32 In which case the stones would be discontinuous and appear like little stones.

1845 Philos. Mag. 26 603 The discontinuous particles of matter with which that space is regularly interspersed.

1888 Pop. Sci. Monthly Mar. 614 These sheets [of water] are usually discontinuous and irregular in limestones and sandstones.

1922 T. M. Lowry Inorg. Chem. xii. 121 The simplest explanation of the indefinite expansion of gases is that they are a discontinuous structure.

1969 G. M. Bennison & A. E. Wright Geol. Hist. Brit. Isles vi. 128 These Lower Palaeozoic rocks occur as discontinuous outcrops.

2009 M. Maslin Global Warming: Very Short Introd. (ed. 2) iii. 54 It is likely that there will be..in some areas, the complete disappearance of so-called discontinuous permafrost.

4. Mathematics. Of a function: not continuous, not varying smoothly for all values of the independent variable. Cf. continuous function n. at continuous adj. Compounds.A function of one variable, f(x), is discontinuous if there is a value of x for which the first derivative of f is undefined, or for which it is not the case that the limit of f(x) as x tends to c is f(c).

ΘΚΠ

the world > relative properties > number > algebra > [adjective] > relating to expressions > relating to functions

generating1671

exponential1704

discontinuous1803

functional1806

odd1812

periodic1820

syzygetic1850

convex1858

graphometric1865

polycyclic1869

subrational1875

synectic1876

variational1879

polyhedral1881

holomorphic1886

tropical1887

Gudermannian1888

monogeneous1888

monotonous1890

oscillating1893

monotonic1901

monotone1903

orthogonalized1909

schlicht1925

concave1942

deconvolved1974

unate1978

1803 J. Bonnycastle tr. C. Bossut Gen. Hist. Math. ix. 412 Euler considered it as altogether arbitrary, and introduced discontinuous functions [Fr. fonctions discontinues] into the calculation.

1845 Cambr. Math. Jrnl. 4 259 The curve may be analytically discontinuous, this is of no importance.

1881 J. C. Maxwell Treat. Electr. & Magnetism (ed. 2) I. 8 The first derivatives of a continuous function may be discontinuous.

1906 Amer. Jrnl. Math. 28 274 Hence our function can be at most pointwise discontinuous in all three variables together.

1956 Econometria 24 192 A sudden disturbance is either discontinuous at the moment of its application (e.g., a ‘step’ function) or has discontinuous derivatives (e.g., a ‘ramp’ function).

2011 D. G. Zill & W. S. Wright Multivariable Calculus (ed. 4) xiii. 693 We have illustrated the graphs of three functions that are discontinuous at points on a curve.

This entry has been updated (OED Third Edition, December 2013; most recently modified version published online March 2022).

单词	discontinuous
释义	discontinuousadj. Brit. /ˌdɪskənˈtɪnjʊəs/, U.S. /ˌdɪskənˈtɪnjʊəs/ Origin: A borrowing from Latin. Etymon: Latin discontinuus. Etymology: < post-classical Latin discontinuus not continuous, interrupted (from 13th cent. in British sources; from 15th cent. in continental sources) < classical Latin dis- dis- prefix + continuus (see continuous adj.). Compare Middle French, French discontinu (a1372; 1784 or earlier in the specific mathematical use designating a function), Spanish discontinuo (1437), Italian discontinuo (a1519). Compare earlier discontinual adj., discontinuate adj. 1. Not continuous in time; occurring or existing at intervals; intermittent. ΘΚΠ the world > relative properties > order > order, sequence, or succession > continuity or uninterruptedness > discontinuity or interrupted condition > [adjective] discontinuala1398 discontinueda1398 discretea1398 discontinualc1450 uncontinued1585 disjunct1594 discontinued1624 discontinuate1625 discontinuated1634 discontinuous1645 infracted1727 uncontinuous1846 inarticulate1852 incontinuous1862 saccadic1936 1645 L. Sarson Anal. I. Timoth. I. 15 119 The affirmative part is most probable; otherwise sacred Chronologie (in which I cannot suspect that there is any hiatus) should be discontinuous. 1742 J. Martyn & E. Chambers tr. Philos. Hist. & Mem. Royal Acad. Sci. Paris V. 139 When the petrefaction of any mass has been discontinuous. 1794 Freemason's Mag. June 431 Their progress must have been necessarily slow, and discontinuous. 1832 Nat. Philos. (Libr. Useful Knowl.) II. Electro-magnetism xi. §176 When the conductors are imperfect, the currents are discontinuous. 1864 H. Spencer Princ. Biol. I. §50. 137 Of multiaxial growth that is discontinuous, a familiar instance among plants exists in the common strawberry. 1884 Law Rep.: Chancery Div. 26 442 A right of way..is a discontinuous easement, because a man is not always walking in and out of his front door. 1917 Industr. Efficiency & Fatigue in Brit. Munition Factories (U.S. Dept. Labor, Bureau of Labor Statistics) 17 Discontinuous night work, in which employees pass into the night shift at regular intervals. 1963 A. Sharp Anc. Voyagers in Indonesia i. 26 Contact even within these islands was limited and discontinuous. 2001 S. T. Asma Stuffed Animals & Pickled Heads v. 200 The early mutationists believed..evolution might happen by discontinuous leaps rather than very slight variations. †2. poetic. Producing discontinuity between the parts of something; (hence) torn apart; open, gaping. Obsolete. ΘΚΠ the world > space > relative position > condition of being open or not closed > [adjective] > wide open or gaping yawningc893 wideOE wide open?c1225 gap-wide1582 gaping1594 mouthed1609 patulous1616 wide-opened1635 dehiscent1649 discontinuous1667 patulent1712 hiant1800 yawn-mouthed1861 1667 J. Milton Paradise Lost vi. 329 So sore The griding sword with discontinuous wound Pass'd through him. View more context for this quotation 1701 J. Philips Splendid Shilling (1705) 5 A horrid Chasm disclose, with Orifice Wide discontinuous. a1765 W. Dunkin Poet. Wks. (1769) I. 482 Parti-colour'd robes, a-gape with rents Wide, discontinuous. 3. Of a substance or object: having breaks or gaps in continuity; consisting of distinct parts; (of two or more objects) not contiguous or joined together; discrete. ΚΠ 1669 ‘E. Philalethes’ Secrets Reveal'd 108 Sometimes it will seem as if it were all discontinuous in grain, and then again it will grow into one Mass again. 1682 N. Grew Anat. Plants i. iii. 22 The Pores of the Pith..are all alike discontinuous. 1719 N. Rowe tr. Lucan Pharsalia iii. 113 Wide-spread the discontinuous Ruins lie. 1750 tr. C. Leonardus Mirror of Stones 32 In which case the stones would be discontinuous and appear like little stones. 1845 Philos. Mag. 26 603 The discontinuous particles of matter with which that space is regularly interspersed. 1888 Pop. Sci. Monthly Mar. 614 These sheets [of water] are usually discontinuous and irregular in limestones and sandstones. 1922 T. M. Lowry Inorg. Chem. xii. 121 The simplest explanation of the indefinite expansion of gases is that they are a discontinuous structure. 1969 G. M. Bennison & A. E. Wright Geol. Hist. Brit. Isles vi. 128 These Lower Palaeozoic rocks occur as discontinuous outcrops. 2009 M. Maslin Global Warming: Very Short Introd. (ed. 2) iii. 54 It is likely that there will be..in some areas, the complete disappearance of so-called discontinuous permafrost. 4. Mathematics. Of a function: not continuous, not varying smoothly for all values of the independent variable. Cf. continuous function n. at continuous adj. Compounds.A function of one variable, f(x), is discontinuous if there is a value of x for which the first derivative of f is undefined, or for which it is not the case that the limit of f(x) as x tends to c is f(c). ΘΚΠ the world > relative properties > number > algebra > [adjective] > relating to expressions > relating to functions generating1671 exponential1704 discontinuous1803 functional1806 odd1812 periodic1820 syzygetic1850 convex1858 graphometric1865 polycyclic1869 subrational1875 synectic1876 variational1879 polyhedral1881 holomorphic1886 tropical1887 Gudermannian1888 monogeneous1888 monotonous1890 oscillating1893 monotonic1901 monotone1903 orthogonalized1909 schlicht1925 concave1942 deconvolved1974 unate1978 1803 J. Bonnycastle tr. C. Bossut Gen. Hist. Math. ix. 412 Euler considered it as altogether arbitrary, and introduced discontinuous functions [Fr. fonctions discontinues] into the calculation. 1845 Cambr. Math. Jrnl. 4 259 The curve may be analytically discontinuous, this is of no importance. 1881 J. C. Maxwell Treat. Electr. & Magnetism (ed. 2) I. 8 The first derivatives of a continuous function may be discontinuous. 1906 Amer. Jrnl. Math. 28 274 Hence our function can be at most pointwise discontinuous in all three variables together. 1956 Econometria 24 192 A sudden disturbance is either discontinuous at the moment of its application (e.g., a ‘step’ function) or has discontinuous derivatives (e.g., a ‘ramp’ function). 2011 D. G. Zill & W. S. Wright Multivariable Calculus (ed. 4) xiii. 693 We have illustrated the graphs of three functions that are discontinuous at points on a curve. This entry has been updated (OED Third Edition, December 2013; most recently modified version published online March 2022). < adj.1645
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