Main

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Related to Main River: Rhine River, Danube River

Main

(mīn), river, c.310 mi (500 km) long, formed near Kulmbach, E central Germany, by the confluence of the Roter Main and the Weisser Main, both of which rise in the Fichtelgebirge. It then winds generally west through the rich farmland of central Germany and past the industrial areas of Schweinfurt, Würzburg, Aschaffenburg, and Frankfurt to the Rhine River at Mainz. Navigable from its junction with the Regnitz River, its chief tributary, the Main is an important east-west route. The Ludwig Canal connects it with the Danube River. A recently completed addition to the canal links the Danube with the Rhine, allowing barge traffic from the North Sea to the Black Sea, a distance of more than 2,000 mi (3,200 km). There are about 40 hydroelectric power plants on the Main, of which Griesheim (62,000-kW capacity) is the largest.

Main

In electrical work, the current from which all other branch circuits are taken.

Main

 

a river in the Federal Republic of Germany; the largest right-bank tributary of the Rhine. Length, 524 km; basin area, 27,200 sq km.

The Main is formed by the confluence of the Red Main, which rises on the slopes of the Fränkische Alb, and the White Main, which rises in the Fichtelgebirge mountains. For most of its length the Main flows amid hills in a narrow valley and across a plain. Its high-water period occurs during the winter and the beginning of spring; there are flash floods in the summer, owing to rain. The water level in the Main’s lower course fluctuates by 2-3 m; the average discharge at the mouth is 170 cu m per sec. The Main is navigable for a distance of almost 400 km from the mouth. The Main valley is densely populated, with such cities as Wiirzburg and Frankfurt being located on the river. The waters of the Main are extremely polluted.


Main

 

a river in Chukchi National Okrug, Magadan Oblast, RSFSR. A right-bank tributary of the Anadyr’ River. Length, 475 km; basin area, 32,800 sq km. The Main rises on the slopes of the Penzhina Range from Lake Main. It flows northeast, for the most part within a broad valley; in its lower course it breaks up into branches. It is fed by snow and rain. The average discharge is about 260 cu m per sec. The Main freezes over in mid-October, and the ice breaks up at the end of May. In its lower course the river is navigable during the high-water period by shallow-draft vessels.

main

[mān]
(electricity)
One of the conductors extending from the service switch, generator bus, or converter bus to the main distribution center in interior wiring.
(engineering)
A duct or pipe that supplies or drains ancillary branches.

main

1. In an air-conditioning system, a major duct or pipe for distributing to or collecting from various branches.
2. In any system of continuous piping, the principal artery of the system to which branches may be connected.

main

1
1. Nautical of, relating to, or denoting any gear, such as a stay or sail, belonging to the mainmast
2. a principal pipe, conduit, duct, or line in a system used to distribute water, electricity, etc.
3. 
a. the main distribution network for water, gas, or electricity
b. (as modifier): mains voltage
4. Literary the open ocean
5. Archaic short for Spanish Main
6. Archaic short for mainland

main

2
1. a throw of the dice in dice games
2. a cockfighting contest

Main

a river in central and W Germany, flowing west through W?rzburg and Frankfurt to the Rhine. Length: about 515 km (320 miles)
References in periodicals archive ?
The second main piece of land - Site A on the illustration - has the potential to become a tidal marina along the line of the old River Tees, which meets the main river corridor at this point.
Marchant and her colleagues studied more than a hundred holes along Semliki's main river and found that all were symmetrical and likely to be produced by two hands working in concert.
EWEB will begin diverting water into the canal again on Sunday, but at just a third of its usual level in an effort to help fish realize they need to avoid the slow-flowing tailrace and instead pick the fast-flowing main river.
The main river event will begin with a race between kayaks and canoes, and inner tubes and homemade floats that will follow from Davis camp and from Community Park.
The Tame is the main river through Birmingham and has been urbanised over many years, running through the city centre and following the M6 where it has been constrained by concrete banks.
It covers the main River Murray channel; its floodplain and wetlands, and the Ramsar-listed Coorong, Lakes and Murray Mouth region, and will be key to delivering water that has been recovered for the environment.
Officers have identified the source of the pollution in the Cwm Beth tributary, but the oil has since worked its way downstream to affect the main River Usk.
The South Tyne is running at a pitiful level, as is the main river when there is no release in from Kielder Reservoir.
Entire communities were swept away as the city's main river, the Matanikau, burst its banks late Thursday, bringing down bridges and inundating the downtown area in a disaster observers said was one of the worst ever faced by the Pacific nation.
In this regard, there are two types of watercourse - main river and ordinary watercourses.
Those rudimentary canoes are the main means of transportation for residents of Mali's central and northern regions travelling to the towns dotting the Niger, the main river in West Africa.
The exercise follows successful campaigns in 2011 and 2012 in which 220 volunteers removed over 50 tonnes of rubbish from the main river upstream of Builth Wells and the Lugg and Arrow tributaries.