bottom gearn.

(In sense 1 usually)Brit.

/ˌbɒtəm ˈɡɪə/, U.S.

/ˌbɑdəm ˈɡɪ(ə)r/ (Otherwise, and in sense 3)Brit.

/ˈbɒtəm ˌɡɪə/, U.S.

/ˈbɑdəm ˌɡɪ(ə)r/

Origin: Formed within English, by compounding. Etymons: bottom adj., gear n.

Etymology: < bottom adj. + gear n.

1. In power transmission: the gearing selection which produces the lowest top speed in proportion to that of the motor.

ΘΚΠ

society > travel > means of travel > a conveyance > vehicle > vehicles according to means of motion > vehicle moving on wheels > [noun] > parts of vehicle moving on wheels > gear > specific gear

bottom gear?1865

high gear1889

low gear1895

fourth1900

second gear1902

first gear1907

second1907

first1909

second speed1912

high1914

low1914

?1865 Z. Colburn in Z. Colburn et al. Locomotive Engin. (1871) iii. 59/1 And it will be found that the angle made by the eccentric rod with the centre line of the engine, in top and bottom gear respectively, corresponds in effect with the same amount of angular advance given to the eccentric itself, when working the valve through a rod leading directly from the eccentric to the valve.

1923 Westm. Gaz. 2 Feb. A stiff climb on bottom gear brings Mosul..in sight.

1968 Listener 1 Aug. 140/3 Still our red-hot old bus engines ploughed on uphill in bottom gear.

2010 Newcastle (Austral.) Herald (Nexis) 19 June (Drive section) 6 And with..a seven-speed automatic that stops at all stations along a well-spaced route between a 5.97:1 bottom gear and a massively overdriven 0.59:1 top gear.

†2. Nautical. A pipe which projects from the bottom of a ship, used in conjunction with a manometer to continuously indicate the speed at which the ship is travelling. Obsolete. rare.

ΘΚΠ

society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > device to ascertain ship's speed through water

log1574

marine surveyor1726

chip log1846

bottom gear1867

1867 C. F. Henwood Text Bk. Turret & Tripod Syst. 40 The bottom-gear consists of a small pipe thrust down at pleasure through the ship's keel or bottom.

3. Fishing. Equipment designed for use in bottom fishing, esp. gear which operates by making contact with the bottom of the body of water.

ΚΠ

1875 Bull. U.S. National Mus. No. 1 31 Deap-sea gear: Cod-gear. Halibut-gear. Flounder-gear. Shark-gear. Tautog-gear. Other bottom-gear.

1890 Fishing Gaz. 22 Nov. 275/2 As to the bottom gear on the spinning-rod, I had ledger tackle made from double salmon gut.

1908 Brit. Sea Anglers' Soc. Q. Sept. 149 The strength of the running line must be in due proportion to the stoutness of the bottom gear used.

1967 Chesapeake Sci. 8 131/1 Catches with the surface trawl in Bolivar Roads often contained shrimp only. These shrimp were in better condition than those taken with the bottom gear.

2009 N. Tebbit Game Cook (2012) 135 The damage caused by the trawler's bottom gear ripping through the seabed not only causes severe damage to the scallops' breeding ground but also decimates the whole flora and fauna of the seabed.

This entry has been updated (OED Third Edition, June 2016; most recently modified version published online December 2021).

单词	bottom gear
释义	bottom gearn. (In sense 1 usually)Brit. /ˌbɒtəm ˈɡɪə/, U.S. /ˌbɑdəm ˈɡɪ(ə)r/ (Otherwise, and in sense 3)Brit. /ˈbɒtəm ˌɡɪə/, U.S. /ˈbɑdəm ˌɡɪ(ə)r/ Origin: Formed within English, by compounding. Etymons: bottom adj., gear n. Etymology: < bottom adj. + gear n. 1. In power transmission: the gearing selection which produces the lowest top speed in proportion to that of the motor. ΘΚΠ society > travel > means of travel > a conveyance > vehicle > vehicles according to means of motion > vehicle moving on wheels > [noun] > parts of vehicle moving on wheels > gear > specific gear bottom gear?1865 high gear1889 low gear1895 fourth1900 second gear1902 first gear1907 second1907 first1909 second speed1912 high1914 low1914 ?1865 Z. Colburn in Z. Colburn et al. Locomotive Engin. (1871) iii. 59/1 And it will be found that the angle made by the eccentric rod with the centre line of the engine, in top and bottom gear respectively, corresponds in effect with the same amount of angular advance given to the eccentric itself, when working the valve through a rod leading directly from the eccentric to the valve. 1923 Westm. Gaz. 2 Feb. A stiff climb on bottom gear brings Mosul..in sight. 1968 Listener 1 Aug. 140/3 Still our red-hot old bus engines ploughed on uphill in bottom gear. 2010 Newcastle (Austral.) Herald (Nexis) 19 June (Drive section) 6 And with..a seven-speed automatic that stops at all stations along a well-spaced route between a 5.97:1 bottom gear and a massively overdriven 0.59:1 top gear. †2. Nautical. A pipe which projects from the bottom of a ship, used in conjunction with a manometer to continuously indicate the speed at which the ship is travelling. Obsolete. rare. ΘΚΠ society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > device to ascertain ship's speed through water log1574 marine surveyor1726 chip log1846 bottom gear1867 1867 C. F. Henwood Text Bk. Turret & Tripod Syst. 40 The bottom-gear consists of a small pipe thrust down at pleasure through the ship's keel or bottom. 3. Fishing. Equipment designed for use in bottom fishing, esp. gear which operates by making contact with the bottom of the body of water. ΚΠ 1875 Bull. U.S. National Mus. No. 1 31 Deap-sea gear: Cod-gear. Halibut-gear. Flounder-gear. Shark-gear. Tautog-gear. Other bottom-gear. 1890 Fishing Gaz. 22 Nov. 275/2 As to the bottom gear on the spinning-rod, I had ledger tackle made from double salmon gut. 1908 Brit. Sea Anglers' Soc. Q. Sept. 149 The strength of the running line must be in due proportion to the stoutness of the bottom gear used. 1967 Chesapeake Sci. 8 131/1 Catches with the surface trawl in Bolivar Roads often contained shrimp only. These shrimp were in better condition than those taken with the bottom gear. 2009 N. Tebbit Game Cook (2012) 135 The damage caused by the trawler's bottom gear ripping through the seabed not only causes severe damage to the scallops' breeding ground but also decimates the whole flora and fauna of the seabed. This entry has been updated (OED Third Edition, June 2016; most recently modified version published online December 2021). < n.?1865
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