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 ?
All panfish, crappies in particular, use wood in the form of fallen trees, cribs, stumps, and logjams in the main river by August if water levels are low to normal.
falls is expected over the upper catchments of all main Rivers (Indus, Jhelum, Chenab, Ravi and Sutlej)
Last season, while fishing the main river from Flat Rock, a fish turned in the side stream inches from my feet.
This sinker is lighter than typically used when fishing the main river. Heavier sinkers can settle deep into the soft mud, and cats sometimes drop the bait when they feel the resistance of the weight stuck in the mud.
But an Environment Agency spokeswoman said: "Under the Water Resources Act 1991, we have powers to maintain and improve main rivers.
As part of the state garden show bayreuth in 2016 will be carried out in the floodplain of the red main river within the entire project investment in the core area of ??the state garden show-tree and willow tree plantings.
She also said that her ministry is not opposed to power projects on rivers, but at the same time, it has to be ensured that main river is never dry during any point of the year.
The clean-up will cover the rivers Llynfi, Irfon, Ithon and Edw as well as the main River Wye between Builth Wells and Hay on Wye.
THE main river coursing through Thailand's capital swelled to record highs yesterday amid fears that flood defences could break and swamp the heart of the city.
"Attempts a couple of decades ago to solve the problem had failed due to the extreme acidity and volume of the discharge; the poor buffering capacity of the main river having little effect as its low base status itself drains naturally acid moorland," he said.
The berth on the south bank and main river channel will be deepened by almost one metre, creating 13 metres of deep water at the berth and 10 metres in the channel.
"This is also a high risk location close to the main River Dee which is recognised as a conservation site of European significance."