Trail

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Trail,

city (1991 pop. 7,919), SE British Columbia, Canada, on the Columbia River just N of the Wash. border. It is a metal-smelting center for a mining area that produces lead, zinc, silver, and gold. Sulfuric acid and fertilizers are manufactured there.

Trail

 

a city in Canada, in the southern part of the province of British Columbia. Population, 11,100 (1971). Trail is a center for the extraction and processing of complex ores. It has a large smelting combine that produces one-half of Canada’s smelted zinc and two-thirds of the country’s smelted lead; antimony and other metals are smelted as well. Trail also produces chemicals.

trail

[trāl]
(astronomy)
A luminous trace left in the sky by the passage of a large meteor.
(geology)
A line of rock fragments that were picked up by glacial ice at a localized outcropping and left scattered along a fairly well-defined tract during the movement of a glacier.
(graphic arts)
One of the lines left on a photographic plate during prolonged exposure to starlight if the motion of the plate was not synchronized with the apparent motion of the sky.
(ordnance)
In bombing, the line between the point of impact of the bomb and a point on the ground directly beneath the aircraft at the moment of impact, assuming that the aircraft stays on course after release of the bomb and maintains a constant speed.
Rear part of a gun carriage which connects the piece with a limber or tractor.

trail

1. the scent left by a moving person or animal that is followed by a hunting animal
2. Engineering the distance between the point of contact of a steerable wheel and a line drawn from the swivel pin axis to the ground