flotationn.

Brit.

/flə(ʊ)ˈteɪʃn/, U.S.

/floʊˈteɪʃən/

Etymology: < float v. + -ation suffix = French flottaison. The spelling flotation is not etymologically justifiable, but is more common in use, probably because it disguises the hybrid formation, so that the word appears more conformable to the general analogy of scientific terms.

a. The action, fact, or process of floating, in various senses; the condition of keeping afloat. attributive. Applied to any device that gives buoyancy. centre of floatation: the centre of gravity in a floating body. plane or line of flotation = French flottaison, ligne de flottaison, the plane or line in which the horizontal surface of a fluid cuts a body floating in it. stable flotation: the position of stable equilibrium in a floating body.

ΘΚΠ

the world > matter > liquid > action or process of floating > [noun]

fleeting1489

floating1555

supernatation1623

swimming1719

flotation1806

1806 O. G. Gregory Treat. Mech. I. iii. iii. 377 The plane of floatation is the horizontal surface of the fluid in which the vessel floats.

1832 H. Douglas Ess. Mil. Bridges (ed. 2) v. 264 A comparison of material with content, should not be made in estimating power of floatation.

1850 J. Greenwood Sailor's Sea-bk. 158 Water Lines, or Lines of Flotation.

1853 E. K. Kane U.S. Grinnell Exped. (1856) xv. 115 These constantly shifting centres of flotation.

1867 W. Pengelly Trans. Devon Assoc. II. 264 It may be doubted whether [these reasons]..are capable of explaining the floatation of clouds.

1878 A. H. Markham Great Frozen Sea ii. 25 They [icebergs] were of very deep flotation.

1884 Law Rep.: Queen's Bench Div. 13 171 During this period of flotation and transit.

attributive.1883 Chambers's Jrnl. 8 Dec. 771/1 Spherical buoys which..show half..their shape above the flotation line.1928 C. F. S. Gamble Story N. Sea Air Station 13 Experiments with various types of floats and flotation bags for aeroplanes.1940 Chambers's Techn. Dict. 343/1 Flotation gear, a system of air or gas bags, sometimes with hydrovanes, to enable a land plane, in an emergency, to land and remain afloat, on water.1958 Times 1 Sept. 4/6 A..general-purpose missile..is being shown complete with parachutes and flotation bag; the latter inflates automatically when the missile falls into the sea.1963 Times 17 May 14/1 Divers jumped from the helicopters and attached the flotation collar to the capsule.1971 Times 17 July 5/4 Under your seat there is a floatation device.

b. The separation of particulate material, esp. pulverized ore, by utilizing the varying capacity for floating on a given liquid that results from differences in the surface properties of the particles (rather than from differences in density); frequently attributive. So froth flotation n. flotation in which the separation is enhanced by using a liquid to which a frothing agent has been added and bubbling air through it, so forming a froth in which certain of the particles collect.

ΘΚΠ

the world > relative properties > wholeness > mutual relation of parts to whole > separation > [noun] > separating from main body > specific methods of separating substances

trajection1657

flotation1908

froth flotation1925

1908 Westm. Gaz. 1 Aug. 15/1 11,775 tons of dump tailings were treated by the flotation process.

1925 Jrnl. Iron & Steel Inst. 111 471 The application of flotation-methods to existing coal-washery-plants, and the cost and working expenses of such appliances, are discussed.

1925 Jrnl. Iron & Steel Inst. 111 472 The article describes the application of froth-flotation processes to the recovery of coal from the sludge.

1927 Daily Express 15 July 10/1 The original ore is readily amenable to treatment by flotation.

1951 R. E. Kirk & D. F. Othmer Encycl. Chem. Technol. VI. 595 Separations made by flotation include not only the concentration of base-metal ores but also widely divergent applications such as the separation of ink from repulped paper stock, of peas from pea pods, [etc.].

1968 J. M. Coulson & J. F. Richardson Chem. Engin. (ed. 2) II. xvii. 704 Froth flotation is widely used in the metallurgical industries where, generally, the ore is difficult to wet and the residual earth is readily wetted.

1970 Materials & Technol. III. ii. 117 Many flotation plants treat over 20,000 tonnes of ore per day.

2. The action of floating a company or enterprise.

ΘΚΠ

society > trade and finance > stocks and shares > [noun] > specific operations or arrangements > promoting joint-stock company

promoting1465

joint-stockism1856

promotion1857

flotation1889

society > trade and finance > financial dealings > types of money-dealing > [noun] > investment > other types of investing or investment

perpetual1833

fundholding1835

capital investment1842

floating1888

flotation1889

carried interest1908

ethical investment1915

National Savings1919

locking up1924

ploughing-back1924

foreign portfolio investment1951

inward investment1962

round-tripping1973

short-termism1986

1889 Financial Times 23 Jan. 1 The London Mexican Prospecting and Finance Company, Limited. Since its flotation it has [etc.].

1893 Westm. Gaz. 1 May 6/1 The flotation of this mine..is now contemplated.

Draft additions January 2005

spec. The action or an act of floating in a buoyant salt solution heated to body temperature inside a special light-proof, sound-proof tank, in order to achieve sensory deprivation and hence relaxation. Usually attributive, esp. in flotation tank (cf. isolation tank n. at isolation n. Additions).

ΚΠ

1977 Libr. Jrnl. 15 June 1390/1 For the past few years, he has lived in California where he maintains five flotation tanks.

1985 New Yorker 3 June 35/1 Flotation centers—commercial operations with a number of the sensory-deprivation tanks available for use by the hour—were opening across the country.

1992 Weekend Independent (Brisbane) 11 Dec. 17/2 Some of the more popular techniques include massage, flotation, meditation, yoga and tai chi.

2001 News (Mexico) (Electronic ed.) 7 Feb. Sulkin says that one hour inside the flotation tank is equivalent to eight hours of sleep. ‘You essentially lose your sense of touch. You become disconnected from the external stimuli of the outside world.’

This entry has not yet been fully updated (first published 1897; most recently modified version published online March 2022).

单词	flotation
释义	flotationn. Brit. /flə(ʊ)ˈteɪʃn/, U.S. /floʊˈteɪʃən/ Etymology: < float v. + -ation suffix = French flottaison. The spelling flotation is not etymologically justifiable, but is more common in use, probably because it disguises the hybrid formation, so that the word appears more conformable to the general analogy of scientific terms. 1. a. The action, fact, or process of floating, in various senses; the condition of keeping afloat. attributive. Applied to any device that gives buoyancy. centre of floatation: the centre of gravity in a floating body. plane or line of flotation = French flottaison, ligne de flottaison, the plane or line in which the horizontal surface of a fluid cuts a body floating in it. stable flotation: the position of stable equilibrium in a floating body. ΘΚΠ the world > matter > liquid > action or process of floating > [noun] fleeting1489 floating1555 supernatation1623 swimming1719 flotation1806 1806 O. G. Gregory Treat. Mech. I. iii. iii. 377 The plane of floatation is the horizontal surface of the fluid in which the vessel floats. 1832 H. Douglas Ess. Mil. Bridges (ed. 2) v. 264 A comparison of material with content, should not be made in estimating power of floatation. 1850 J. Greenwood Sailor's Sea-bk. 158 Water Lines, or Lines of Flotation. 1853 E. K. Kane U.S. Grinnell Exped. (1856) xv. 115 These constantly shifting centres of flotation. 1867 W. Pengelly Trans. Devon Assoc. II. 264 It may be doubted whether [these reasons]..are capable of explaining the floatation of clouds. 1878 A. H. Markham Great Frozen Sea ii. 25 They [icebergs] were of very deep flotation. 1884 Law Rep.: Queen's Bench Div. 13 171 During this period of flotation and transit. attributive.1883 Chambers's Jrnl. 8 Dec. 771/1 Spherical buoys which..show half..their shape above the flotation line.1928 C. F. S. Gamble Story N. Sea Air Station 13 Experiments with various types of floats and flotation bags for aeroplanes.1940 Chambers's Techn. Dict. 343/1 Flotation gear, a system of air or gas bags, sometimes with hydrovanes, to enable a land plane, in an emergency, to land and remain afloat, on water.1958 Times 1 Sept. 4/6 A..general-purpose missile..is being shown complete with parachutes and flotation bag; the latter inflates automatically when the missile falls into the sea.1963 Times 17 May 14/1 Divers jumped from the helicopters and attached the flotation collar to the capsule.1971 Times 17 July 5/4 Under your seat there is a floatation device. b. The separation of particulate material, esp. pulverized ore, by utilizing the varying capacity for floating on a given liquid that results from differences in the surface properties of the particles (rather than from differences in density); frequently attributive. So froth flotation n. flotation in which the separation is enhanced by using a liquid to which a frothing agent has been added and bubbling air through it, so forming a froth in which certain of the particles collect. ΘΚΠ the world > relative properties > wholeness > mutual relation of parts to whole > separation > [noun] > separating from main body > specific methods of separating substances trajection1657 flotation1908 froth flotation1925 1908 Westm. Gaz. 1 Aug. 15/1 11,775 tons of dump tailings were treated by the flotation process. 1925 Jrnl. Iron & Steel Inst. 111 471 The application of flotation-methods to existing coal-washery-plants, and the cost and working expenses of such appliances, are discussed. 1925 Jrnl. Iron & Steel Inst. 111 472 The article describes the application of froth-flotation processes to the recovery of coal from the sludge. 1927 Daily Express 15 July 10/1 The original ore is readily amenable to treatment by flotation. 1951 R. E. Kirk & D. F. Othmer Encycl. Chem. Technol. VI. 595 Separations made by flotation include not only the concentration of base-metal ores but also widely divergent applications such as the separation of ink from repulped paper stock, of peas from pea pods, [etc.]. 1968 J. M. Coulson & J. F. Richardson Chem. Engin. (ed. 2) II. xvii. 704 Froth flotation is widely used in the metallurgical industries where, generally, the ore is difficult to wet and the residual earth is readily wetted. 1970 Materials & Technol. III. ii. 117 Many flotation plants treat over 20,000 tonnes of ore per day. 2. The action of floating a company or enterprise. ΘΚΠ society > trade and finance > stocks and shares > [noun] > specific operations or arrangements > promoting joint-stock company promoting1465 joint-stockism1856 promotion1857 flotation1889 society > trade and finance > financial dealings > types of money-dealing > [noun] > investment > other types of investing or investment perpetual1833 fundholding1835 capital investment1842 floating1888 flotation1889 carried interest1908 ethical investment1915 National Savings1919 locking up1924 ploughing-back1924 foreign portfolio investment1951 inward investment1962 round-tripping1973 short-termism1986 1889 Financial Times 23 Jan. 1 The London Mexican Prospecting and Finance Company, Limited. Since its flotation it has [etc.]. 1893 Westm. Gaz. 1 May 6/1 The flotation of this mine..is now contemplated. Draft additions January 2005 spec. The action or an act of floating in a buoyant salt solution heated to body temperature inside a special light-proof, sound-proof tank, in order to achieve sensory deprivation and hence relaxation. Usually attributive, esp. in flotation tank (cf. isolation tank n. at isolation n. Additions). ΚΠ 1977 Libr. Jrnl. 15 June 1390/1 For the past few years, he has lived in California where he maintains five flotation tanks. 1985 New Yorker 3 June 35/1 Flotation centers—commercial operations with a number of the sensory-deprivation tanks available for use by the hour—were opening across the country. 1992 Weekend Independent (Brisbane) 11 Dec. 17/2 Some of the more popular techniques include massage, flotation, meditation, yoga and tai chi. 2001 News (Mexico) (Electronic ed.) 7 Feb. Sulkin says that one hour inside the flotation tank is equivalent to eight hours of sleep. ‘You essentially lose your sense of touch. You become disconnected from the external stimuli of the outside world.’ This entry has not yet been fully updated (first published 1897; most recently modified version published online March 2022). < n.1806
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