metacentremetacentern.

Brit.

/ˈmɛtəˌsɛntə/, U.S.

/ˈmɛdəˌsɛn(t)ər/

Forms: 1700s metacenter, 1700s– metacentre; U.S. 1800s– metacenter.

Origin: Probably of multiple origins. Partly a borrowing from French. Probably partly formed within English, by derivation. Etymons: French métacentre ; meta- prefix, centre n.¹

Etymology: < French métacentre ( P. Bouguer Traité du navire (1746) ii. ii. 257) < méta- meta- prefix + centre centre n.¹ In sense 2 probably formed independently < meta- prefix + centre n.¹

1. Physics and Shipbuilding. The limiting position of the point of intersection of a line drawn vertically through the centre of buoyancy of a ship or other floating body when it is upright, and a line drawn vertically through the new centre of buoyancy when it is slightly tilted (which point must be above the centre of gravity of the body if it is to return to an upright position). Also called shifting centre.

ΘΚΠ

society > travel > travel by water > vessel, ship, or boat > shipbuilding and repairing > [noun] > shipbuilding > metacentre

metacentre1765

shifting centre1794

1765 M. Murray Suppl. 39 in Treat. Ship-building & Navigation (ed. 2) It would..be of great advantage..that the center of gravity be properly situated with respect to the metacenter.

1794 D. Steel Elements & Pract. Rigging & Seamanship II. 283 The metacenter..has been likewise called the shifting center.

1796 Philos. Trans. (Royal Soc.) 86 110 The point of equipoise S, otherwise called the metacentre, or centre of equilibrium.

1867 J. Peake Rudiments Naval Archit. (ed. 3) 47 The Height of the Metacentre above the Centre of Gravity of displacement.

1884 Proc. Royal Soc. 37 206 The practice is to construct a curve of metacentres, which shows how the height of the metacentre varies with draught of water.

1922 Amer. Math. Monthly 29 87 The required m is the metacentric height, or the distance from the center of gravity of the ship to the metacenter when the vessel is upright.

1946 G. C. Saul in M. Davidson Gyroscope 255 Metacentric height, the distance between the metacentre and the mean centre of gravity on the middle line of a ship.

1989 New Scientist 8 Apr. 59/3 There, he encountered Pierre Bouguer's concept of the ‘metacentre’ in ship stability.

2. Biology. P. C. Mitchell's name for: a divergence from the primitive form of a particular grouping of organisms which itself becomes the prototype for further evolution. rare.

ΚΠ

1901 P. C. Mitchell in Trans. Linn. Soc.: Zool. 8 200 The ground-form is closely similar to that of the Colymbomorphaæ, pointing towards the existence of a common metacentre for all those birds. From this metacentre the groups of Ciconüforms have diverged in different directions and to different amounts.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	metacentre
释义	metacentremetacentern. Brit. /ˈmɛtəˌsɛntə/, U.S. /ˈmɛdəˌsɛn(t)ər/ Forms: 1700s metacenter, 1700s– metacentre; U.S. 1800s– metacenter. Origin: Probably of multiple origins. Partly a borrowing from French. Probably partly formed within English, by derivation. Etymons: French métacentre ; meta- prefix, centre n.¹ Etymology: < French métacentre ( P. Bouguer Traité du navire (1746) ii. ii. 257) < méta- meta- prefix + centre centre n.¹ In sense 2 probably formed independently < meta- prefix + centre n.¹ 1. Physics and Shipbuilding. The limiting position of the point of intersection of a line drawn vertically through the centre of buoyancy of a ship or other floating body when it is upright, and a line drawn vertically through the new centre of buoyancy when it is slightly tilted (which point must be above the centre of gravity of the body if it is to return to an upright position). Also called shifting centre. ΘΚΠ society > travel > travel by water > vessel, ship, or boat > shipbuilding and repairing > [noun] > shipbuilding > metacentre metacentre1765 shifting centre1794 1765 M. Murray Suppl. 39 in Treat. Ship-building & Navigation (ed. 2) It would..be of great advantage..that the center of gravity be properly situated with respect to the metacenter. 1794 D. Steel Elements & Pract. Rigging & Seamanship II. 283 The metacenter..has been likewise called the shifting center. 1796 Philos. Trans. (Royal Soc.) 86 110 The point of equipoise S, otherwise called the metacentre, or centre of equilibrium. 1867 J. Peake Rudiments Naval Archit. (ed. 3) 47 The Height of the Metacentre above the Centre of Gravity of displacement. 1884 Proc. Royal Soc. 37 206 The practice is to construct a curve of metacentres, which shows how the height of the metacentre varies with draught of water. 1922 Amer. Math. Monthly 29 87 The required m is the metacentric height, or the distance from the center of gravity of the ship to the metacenter when the vessel is upright. 1946 G. C. Saul in M. Davidson Gyroscope 255 Metacentric height, the distance between the metacentre and the mean centre of gravity on the middle line of a ship. 1989 New Scientist 8 Apr. 59/3 There, he encountered Pierre Bouguer's concept of the ‘metacentre’ in ship stability. 2. Biology. P. C. Mitchell's name for: a divergence from the primitive form of a particular grouping of organisms which itself becomes the prototype for further evolution. rare. ΚΠ 1901 P. C. Mitchell in Trans. Linn. Soc.: Zool. 8 200 The ground-form is closely similar to that of the Colymbomorphaæ, pointing towards the existence of a common metacentre for all those birds. From this metacentre the groups of Ciconüforms have diverged in different directions and to different amounts. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < n.1765
随便看	θ29908 θ29909 θ2991 θ29910 θ29911 θ29912 θ29913 θ29914 θ29915 θ29916 θ29917 θ29918 θ29919 θ2992 θ29920 θ29921 θ29922 θ29923 θ29924 θ29925 θ29926 θ29927 θ29928 θ29929 θ2993