librationn.

Brit.

/lʌɪˈbreɪʃn/, U.S.

/laɪˈbreɪʃən/

Etymology: < Latin lībrātiōn-em, noun of action < lībrāre to librate v. Compare French libration.

Thesaurus »

a. The action of librating; motion like that of the beam of a balance oscillating upon its pivot; swaying to and fro.

b. The state of being balanced or in equipoise; equipoise, balance.

ΘΚΠ

the world > relative properties > relationship > equality or equivalence > [noun] > equilibrium

evennessa1398

peisea1400

equal (also even) poise1555

counterpoise1594

libration1603

equal, even scale1604

equilibre1621

poise1621

poisurea1625

balance1642

equilibrity1644

equilibrium1660

equipoise1661

equipoisure1683

equiponderancy1710

equiponderance1775

repose1805

equibalance1841

stasis1920

1603 C. Heydon Def. Iudiciall Astrol. xviii. 381 This Thebit..perceiuing the quantitie of the tropike yeare to varie, first inuented the libration of the 8. sphere.

1625 N. Carpenter Geogr. Delineated i. iv. 73 Some others..imagine the Center..of the Earth, to be moued vp and down by a certaine motion of Libration.

1625 N. Carpenter Geogr. Delineated ii. vi. 85 This libration or motion of the Water cannot be caused by the winde or Aire.

1653 Bp. J. Taylor Golden Grove: Winter v. 60 The poor bird was beaten back..descending more at every breath of the tempest then it could recover by the libration and frequent weighing of his wings.

1690 T. Burnet Theory of Earth iii. 51 This must needs make it lose its former poise and libration.

1694 W. Holder Treat. Harmony ii. 37 The Librations of the Pendulum.

1728 J. Thomson Spring 37 Their Pinions still, In loose Libration stretch'd.

1791 E. Darwin Bot. Garden ii. 26 So turns the needle to the pole it loves, With fine librations quivering, as it moves.

1853 E. K. Kane U.S. Grinnell Exped. xlviii. 446 Others [viz. icebergs] a congeries of rubbish, and illustrating every possible condition of libration.

1874 H. R. Reynolds John the Baptist v. iii. 341 A dazzling brightness above the Splendour of the Sun was drawing nearer with gentle librations of its wings.

c. transferred and figurative.

ΚΠ

1650 T. Vaughan Anthroposophia Theomagica 92 Such chiming and clinching of words, Antithetall Librations, and Symphonicall rappings.

1659 H. More Immortality of Soul ii. x. 218 The Libration or Reciprocation of the Spirits in the Tensility of the Muscles.

1659 J. Harrington Art of Law-giving iii. Pref. 8 Such a libration or poyse of Orders.

1659 O. Walker Some Instr. Art of Oratory 97 The short [period] is adverse to Metaphors &c. the long to exact correspondence and libration of its parts.

1672 J. Dryden Conquest Granada ii. iii. i. 106 The bounds of thy libration here are set.

1840 Blackwood's Mag. 47 719 The tremulous libration of the equipoise.

1882 J. H. Blunt Reformation Church of Eng. II. 480 Oxford has its regular periods of theological libration.

2. Astronomy. A real or apparent motion of an oscillating kind. libration of the moon: an apparent irregularity of the moon's motion which makes it appear to oscillate in such a manner that the parts near the edge of the disk are alternately visible and invisible. (There are three kinds, called libration in latitude, libration in longitude, and diurnal or parallactic libration.)

ΘΚΠ

the world > the universe > planet > planetary movement > [noun] > other movements

translation of (the) light and nature?1583

separation1595

ingress1603

transit1644

libration1670

the world > the universe > planet > primary planet > moon > movement of moon > [noun] > libration

libration1670

evection1704

reflection1704

variation1704

1670 J. Flamstead in Philos. Trans. 1669 (Royal Soc.) 4 1109 If the Libration of the Moon be known, the protraction of the Star's way in this Appearance will be facile.

1671 Philos. Trans. 1670 (Royal Soc.) 5 2061 Doubtless, as there is a certain Libration in the Moon, so 'tis not absurd to me, to hold a kind of Libration in the Earth, from the Annual and Diurnal motion of the same.

1678 J. Norris Coll. Misc. (1699) 181 We are nonplus'd at a thousand Phenomenas in Nature, which if they were not done, we should have thought them absolutely impossible, as for instance the central Libration of the Earth.

1690 W. Leybourn Cursus mathematicus f. 754 Now this Libration of the Eccentrick they commonly call the Deviation.

1728 tr. I. Newton Treat. Syst. World 61 The Moon's libration in longitude.

1804 Herschel in Philos. Trans. (Royal Soc.) 94 374 Some small annual variation, or libration of position, which might lead to a discovery of the parallax of the fixed stars.

1815 J. Smith Panorama Sci. & Art I. 547 Her [sc. the moon's] libration in latitude, is when either of her poles appears to dip a little towards the earth.

1834 M. Somerville On Connexion Physical Sci. (1849) ix. 78 The moon..is liable to librations depending upon the position of the spectator.

1855 D. Brewster Mem. Life I. Newton (new ed.) I. vi. 128 Galileo had discovered and explained the diurnal libration, arising from the spectator not viewing the moon from the centre of the earth.

1861 G. F. Chambers Handbk. Descr. Astron. i. vii. 42 When the north pole [of the Moon] leans towards the Earth, we see somewhat more of the region surrounding it,..this is known as libration in latitude.

1874 F. W. Farrar Life Christ 51 There is one hemisphere of the lunar surface on which in its entirety, no human eye has ever gazed, while at the same time the moon's librations enable us to conjecture of its general character.

†3. Weighing (literal and figurative). Obsolete.

ΘΚΠ

the world > relative properties > measurement > measurement by weighing > [noun]

peisinga1382

weighing1430

weighta1483

balancing1599

perlibration1623

trutination1633

ponderation1646

libration1657

scaling1841

weighment1878

1657 W. Morice Coena quasi Κοινὴ xiii. 185 We..have made libration, what weight the judgment and practice of the ancient Church doth bear.

1667 E. Waterhouse Short Narr. Fire London 48 Prudent libration of what weight they will and will not beare.

1770 Emerson (title) Calculation, libration and mensuration, or the arts of reckoning, weighing and measuring.

Derivatives

liˈbrational adj. pertaining to (the moon's) libration.

ΘΚΠ

the world > the universe > planet > primary planet > moon > movement of moon > [adjective] > libration

librational1880

1880 R. A. Proctor Rough Ways 110 Photographs of the moon should be taken in every aspect..of her librational swayings.

This entry has not yet been fully updated (first published 1902; most recently modified version published online March 2022).

单词	libration
释义	librationn. Brit. /lʌɪˈbreɪʃn/, U.S. /laɪˈbreɪʃən/ Etymology: < Latin lībrātiōn-em, noun of action < lībrāre to librate v. Compare French libration. 1. Thesaurus » a. The action of librating; motion like that of the beam of a balance oscillating upon its pivot; swaying to and fro. b. The state of being balanced or in equipoise; equipoise, balance. ΘΚΠ the world > relative properties > relationship > equality or equivalence > [noun] > equilibrium evennessa1398 peisea1400 equal (also even) poise1555 counterpoise1594 libration1603 equal, even scale1604 equilibre1621 poise1621 poisurea1625 balance1642 equilibrity1644 equilibrium1660 equipoise1661 equipoisure1683 equiponderancy1710 equiponderance1775 repose1805 equibalance1841 stasis1920 1603 C. Heydon Def. Iudiciall Astrol. xviii. 381 This Thebit..perceiuing the quantitie of the tropike yeare to varie, first inuented the libration of the 8. sphere. 1625 N. Carpenter Geogr. Delineated i. iv. 73 Some others..imagine the Center..of the Earth, to be moued vp and down by a certaine motion of Libration. 1625 N. Carpenter Geogr. Delineated ii. vi. 85 This libration or motion of the Water cannot be caused by the winde or Aire. 1653 Bp. J. Taylor Golden Grove: Winter v. 60 The poor bird was beaten back..descending more at every breath of the tempest then it could recover by the libration and frequent weighing of his wings. 1690 T. Burnet Theory of Earth iii. 51 This must needs make it lose its former poise and libration. 1694 W. Holder Treat. Harmony ii. 37 The Librations of the Pendulum. 1728 J. Thomson Spring 37 Their Pinions still, In loose Libration stretch'd. 1791 E. Darwin Bot. Garden ii. 26 So turns the needle to the pole it loves, With fine librations quivering, as it moves. 1853 E. K. Kane U.S. Grinnell Exped. xlviii. 446 Others [viz. icebergs] a congeries of rubbish, and illustrating every possible condition of libration. 1874 H. R. Reynolds John the Baptist v. iii. 341 A dazzling brightness above the Splendour of the Sun was drawing nearer with gentle librations of its wings. c. transferred and figurative. ΚΠ 1650 T. Vaughan Anthroposophia Theomagica 92 Such chiming and clinching of words, Antithetall Librations, and Symphonicall rappings. 1659 H. More Immortality of Soul ii. x. 218 The Libration or Reciprocation of the Spirits in the Tensility of the Muscles. 1659 J. Harrington Art of Law-giving iii. Pref. 8 Such a libration or poyse of Orders. 1659 O. Walker Some Instr. Art of Oratory 97 The short [period] is adverse to Metaphors &c. the long to exact correspondence and libration of its parts. 1672 J. Dryden Conquest Granada ii. iii. i. 106 The bounds of thy libration here are set. 1840 Blackwood's Mag. 47 719 The tremulous libration of the equipoise. 1882 J. H. Blunt Reformation Church of Eng. II. 480 Oxford has its regular periods of theological libration. 2. Astronomy. A real or apparent motion of an oscillating kind. libration of the moon: an apparent irregularity of the moon's motion which makes it appear to oscillate in such a manner that the parts near the edge of the disk are alternately visible and invisible. (There are three kinds, called libration in latitude, libration in longitude, and diurnal or parallactic libration.) ΘΚΠ the world > the universe > planet > planetary movement > [noun] > other movements translation of (the) light and nature?1583 separation1595 ingress1603 transit1644 libration1670 the world > the universe > planet > primary planet > moon > movement of moon > [noun] > libration libration1670 evection1704 reflection1704 variation1704 1670 J. Flamstead in Philos. Trans. 1669 (Royal Soc.) 4 1109 If the Libration of the Moon be known, the protraction of the Star's way in this Appearance will be facile. 1671 Philos. Trans. 1670 (Royal Soc.) 5 2061 Doubtless, as there is a certain Libration in the Moon, so 'tis not absurd to me, to hold a kind of Libration in the Earth, from the Annual and Diurnal motion of the same. 1678 J. Norris Coll. Misc. (1699) 181 We are nonplus'd at a thousand Phenomenas in Nature, which if they were not done, we should have thought them absolutely impossible, as for instance the central Libration of the Earth. 1690 W. Leybourn Cursus mathematicus f. 754 Now this Libration of the Eccentrick they commonly call the Deviation. 1728 tr. I. Newton Treat. Syst. World 61 The Moon's libration in longitude. 1804 Herschel in Philos. Trans. (Royal Soc.) 94 374 Some small annual variation, or libration of position, which might lead to a discovery of the parallax of the fixed stars. 1815 J. Smith Panorama Sci. & Art I. 547 Her [sc. the moon's] libration in latitude, is when either of her poles appears to dip a little towards the earth. 1834 M. Somerville On Connexion Physical Sci. (1849) ix. 78 The moon..is liable to librations depending upon the position of the spectator. 1855 D. Brewster Mem. Life I. Newton (new ed.) I. vi. 128 Galileo had discovered and explained the diurnal libration, arising from the spectator not viewing the moon from the centre of the earth. 1861 G. F. Chambers Handbk. Descr. Astron. i. vii. 42 When the north pole [of the Moon] leans towards the Earth, we see somewhat more of the region surrounding it,..this is known as libration in latitude. 1874 F. W. Farrar Life Christ 51 There is one hemisphere of the lunar surface on which in its entirety, no human eye has ever gazed, while at the same time the moon's librations enable us to conjecture of its general character. †3. Weighing (literal and figurative). Obsolete. ΘΚΠ the world > relative properties > measurement > measurement by weighing > [noun] peisinga1382 weighing1430 weighta1483 balancing1599 perlibration1623 trutination1633 ponderation1646 libration1657 scaling1841 weighment1878 1657 W. Morice Coena quasi Κοινὴ xiii. 185 We..have made libration, what weight the judgment and practice of the ancient Church doth bear. 1667 E. Waterhouse Short Narr. Fire London 48 Prudent libration of what weight they will and will not beare. 1770 Emerson (title) Calculation, libration and mensuration, or the arts of reckoning, weighing and measuring. Derivatives liˈbrational adj. pertaining to (the moon's) libration. ΘΚΠ the world > the universe > planet > primary planet > moon > movement of moon > [adjective] > libration librational1880 1880 R. A. Proctor Rough Ways 110 Photographs of the moon should be taken in every aspect..of her librational swayings. This entry has not yet been fully updated (first published 1902; most recently modified version published online March 2022). < n.1603
随便看	decuple decupled decuples decuplet decupling decuria decuriate decuriation decuries decurion decurionate decurionates decurions decurionship decurrence decurrences decurrencies decurrency decurrent decurrently decurring decurse decursion decursions decursive