water hammern.

Brit.

/ˈwɔːtə ˌhamə/, U.S.

/ˈwɔdər ˌhæmər/,

/ˈwɑdər ˌhæmər/

Origin: Formed within English, by compounding. Etymons: water n., hammer n.¹

Etymology: < water n. + hammer n.¹

1. An evacuated tube partly filled with water, which when the tube is reversed falls to the other end with a noise like a hammer blow, used to illustrate the fact that in a vacuum liquids and solids fall at the same rate. Now chiefly historical.

ΘΚΠ

the world > matter > chemistry > equipment or apparatus > [noun] > instruments

rammer1660

water hammer1765

saccharometer1784

thermometer1801

alcoholometer1803

alcohometer1809

cryophorus1813

nitrometer1821

alcoometer1825

alcoholmeter1831

blanchimeter1847

wet-bulb1849

absorptiometer1855

microtome1856

argentometer1879

Brix1897

Ostwald pycnometer1898

turbidimeter1905

Ostwald viscometer1911

oedometer1915

impinger1922

polarograph1925

photogoniometer1927

ultramicrotome1953

1765 J. Watt Notebk. in E. Robinson & D. McKie Partners in Sci. (1970) 446 The Water was purged of Air..by shaking it in Vacuo like the Water hammer which always detached Quantitys of Air.

1789 Philos. Trans. (Royal Soc.) 79 143 I sealed it hermetically, in the manner in which water hammers are made.

1805 Jrnl. Nat. Philos. July 217 The water-hammer. This instrument, which is made and sold by the glass-blowers and barometer-makers, consists [etc.].

1881 J. Tyndall Ess. Floating Matter of Air iii. 147 A number of hermetically-sealed tubes charged with the same infusion..have maintained for more than a year..their water-hammer sound.

2003 S. Lehrer Understanding Pediatric Heart Sounds (ed. 2) xii. 163 The water hammer, a toy beloved by children in Victorian England, was made from a sealed glass tube containing water in a vacuum.

2. A sound of knocking or banging in a water pipe when the flow within it is suddenly stopped, as by closing a tap or valve. Also as a mass noun.When the moving mass of water is halted in the confined space, there is a sudden increase in pressure which can produce a shock wave in the water.

ΘΚΠ

the world > physical sensation > hearing and noise > degree, kind, or quality of sound > sound of water > [noun] > water-hammer

water hammer1843

reverberation1967

1843 Amer. Railroad Jrnl. Oct. 295 The ‘water hammer’ will burst a pipe after it has been in use for some years.

1910 Encycl. Brit. XIV. 67/1 If in a pipe through which water is flowing a sluice is suddenly closed so as to arrest the forward movement of the water, there is a rise of pressure... This action is termed water hammer or water ram.

1919 Blackwood's Mag. Feb. 183/2 There came a bubbling roar from the vent..and then the clang of a heavy ‘water-hammer’ in the pipe as the tank filled.

1936 R. Kipling Something of Myself viii. 210 When these books were finished they said so themselves with, almost, the water-hammer click of a tap turned off.

1981 E. K. Blankenbaker Mod. Plumbing xvii. 202/2 Antihammer devices use trapped air to cushion and absorb the energy of water hammers.

2004 Z. Unger Working Fire xii. 181 I opened the spindle..slowly to avoid a water hammer at the far end.

†3. Medicine. A metal instrument heated in boiling water or the flame of a lamp and applied to the skin to produce counterirritation or cauterization. Obsolete. rare.

ΘΚΠ

the world > health and disease > healing > medical appliances or equipment > other surgical equipment > [noun] > hammer to raise blister

water hammer1886

1886 A. H. Buck Ref. Handbk. Med. Sci. II. 8/2 Cauterization may be accomplished by the use of the water-hammer, ignipuncture, or the application of moxæ.

Compounds

water-hammer pulse n. Medicine a pulse that is felt by an examiner to strike forcibly but collapse quickly, characteristic esp. of incomplete closure of the aortic valve.

ΘΚΠ

the world > health and disease > ill health > a disease > disorders of internal organs > disordered pulse or circulation > [noun] > irregular pulse

water-hammer pulse1850

arrhythmia1888

1850 Provinc. Med. & Surg. Jrnl. 11 Dec. 687/1 The pulse..giving exactly that sensation to the finger which is experienced by gently tapping an abdomen distended with fluid; it is hence called the water-hammer pulse.

1933 Amer. Heart Jrnl. 8 585 There was a double aortic murmur and a waterhammer pulse.

2008 J. Lumley DIY Clin. Exam. for Med. Students 219 This ‘water-hammer’ pulse is felt by your palm placed around the wrist.

This entry has been updated (OED Third Edition, September 2015; most recently modified version published online December 2021).

单词	water hammer
释义	water hammern. Brit. /ˈwɔːtə ˌhamə/, U.S. /ˈwɔdər ˌhæmər/, /ˈwɑdər ˌhæmər/ Origin: Formed within English, by compounding. Etymons: water n., hammer n.¹ Etymology: < water n. + hammer n.¹ 1. An evacuated tube partly filled with water, which when the tube is reversed falls to the other end with a noise like a hammer blow, used to illustrate the fact that in a vacuum liquids and solids fall at the same rate. Now chiefly historical. ΘΚΠ the world > matter > chemistry > equipment or apparatus > [noun] > instruments rammer1660 water hammer1765 saccharometer1784 thermometer1801 alcoholometer1803 alcohometer1809 cryophorus1813 nitrometer1821 alcoometer1825 alcoholmeter1831 blanchimeter1847 wet-bulb1849 absorptiometer1855 microtome1856 argentometer1879 Brix1897 Ostwald pycnometer1898 turbidimeter1905 Ostwald viscometer1911 oedometer1915 impinger1922 polarograph1925 photogoniometer1927 ultramicrotome1953 1765 J. Watt Notebk. in E. Robinson & D. McKie Partners in Sci. (1970) 446 The Water was purged of Air..by shaking it in Vacuo like the Water hammer which always detached Quantitys of Air. 1789 Philos. Trans. (Royal Soc.) 79 143 I sealed it hermetically, in the manner in which water hammers are made. 1805 Jrnl. Nat. Philos. July 217 The water-hammer. This instrument, which is made and sold by the glass-blowers and barometer-makers, consists [etc.]. 1881 J. Tyndall Ess. Floating Matter of Air iii. 147 A number of hermetically-sealed tubes charged with the same infusion..have maintained for more than a year..their water-hammer sound. 2003 S. Lehrer Understanding Pediatric Heart Sounds (ed. 2) xii. 163 The water hammer, a toy beloved by children in Victorian England, was made from a sealed glass tube containing water in a vacuum. 2. A sound of knocking or banging in a water pipe when the flow within it is suddenly stopped, as by closing a tap or valve. Also as a mass noun.When the moving mass of water is halted in the confined space, there is a sudden increase in pressure which can produce a shock wave in the water. ΘΚΠ the world > physical sensation > hearing and noise > degree, kind, or quality of sound > sound of water > [noun] > water-hammer water hammer1843 reverberation1967 1843 Amer. Railroad Jrnl. Oct. 295 The ‘water hammer’ will burst a pipe after it has been in use for some years. 1910 Encycl. Brit. XIV. 67/1 If in a pipe through which water is flowing a sluice is suddenly closed so as to arrest the forward movement of the water, there is a rise of pressure... This action is termed water hammer or water ram. 1919 Blackwood's Mag. Feb. 183/2 There came a bubbling roar from the vent..and then the clang of a heavy ‘water-hammer’ in the pipe as the tank filled. 1936 R. Kipling Something of Myself viii. 210 When these books were finished they said so themselves with, almost, the water-hammer click of a tap turned off. 1981 E. K. Blankenbaker Mod. Plumbing xvii. 202/2 Antihammer devices use trapped air to cushion and absorb the energy of water hammers. 2004 Z. Unger Working Fire xii. 181 I opened the spindle..slowly to avoid a water hammer at the far end. †3. Medicine. A metal instrument heated in boiling water or the flame of a lamp and applied to the skin to produce counterirritation or cauterization. Obsolete. rare. ΘΚΠ the world > health and disease > healing > medical appliances or equipment > other surgical equipment > [noun] > hammer to raise blister water hammer1886 1886 A. H. Buck Ref. Handbk. Med. Sci. II. 8/2 Cauterization may be accomplished by the use of the water-hammer, ignipuncture, or the application of moxæ. Compounds water-hammer pulse n. Medicine a pulse that is felt by an examiner to strike forcibly but collapse quickly, characteristic esp. of incomplete closure of the aortic valve. ΘΚΠ the world > health and disease > ill health > a disease > disorders of internal organs > disordered pulse or circulation > [noun] > irregular pulse water-hammer pulse1850 arrhythmia1888 1850 Provinc. Med. & Surg. Jrnl. 11 Dec. 687/1 The pulse..giving exactly that sensation to the finger which is experienced by gently tapping an abdomen distended with fluid; it is hence called the water-hammer pulse. 1933 Amer. Heart Jrnl. 8 585 There was a double aortic murmur and a waterhammer pulse. 2008 J. Lumley DIY Clin. Exam. for Med. Students 219 This ‘water-hammer’ pulse is felt by your palm placed around the wrist. This entry has been updated (OED Third Edition, September 2015; most recently modified version published online December 2021). < n.1765
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