• WordNet 3.6
    • n snowplow a vehicle used to push snow from roads
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Webster's Revised Unabridged Dictionary
    • n Snowplow An implement operating like a plow, but on a larger scale, for clearing away the snow from roads, railways, etc.
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Century Dictionary and Cyclopedia
    • n snowplow An implement for clearing away snow from roads, railways, etc. There are two kinds—one to be hauled by horses, oxen, etc., as on a common highway, and the other to be placed in front of a locomotive to clear the rails. A modification of the latter is adapted to street-railroads. The snow-plow for ordinary country roads, usually consists of a frame of boards braced together so as to form an acute angle in front, and spread out behind to any required distance. The machine being drawn by horses harnessed to the center framework, the angular point enters the snow, which is thrown off by the side-boards, and thus a free passage is opened for pedestrians, etc. For railway purposes, snow-plows are of various forms, adapted to the character of the country, the amount of snowfall, the tendency to drift, etc. Such plows vary in size from the simple plows carried on the front of an engine, resembling a cowcatcher with smooth iron sides, to heavy structures mounted on freight-car trucks, and pushed before one locomotive or more, or, as sometimes made, self-propelling. In recent forms the principle of centrifugal force has been utilized for removal of the snow. Snow-plows are often of great size, sometimes weighing fifty tons, and can be forced through very deep drifts.
    • n snowplow Snow-plows used on electric roads are special cars fitted with high-power motors and some form of snow-scraper. One form, called a shear-plow, is fitted with strong wide shear-boards placed in pairs, the lower and outer board being adjustable at an angle of about 45° across the track in front of the car; another, called a nose-plow, has a double shear in front of the car. Each style also employs wing-scrapers behind the plows to shove the snow away from the car. Small shear-plows, called track-scrapers, are also fitted to ordinary cars to remove light falls of snow. For city streets snow-plows are often replaced by a machine called a track-sweeper.
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In literature:

That fifty thousand they lost on that snowplow just about put the crimp in 'em.
"The White Desert" by Courtney Ryley Cooper
The men have been out with homemade snowplows breaking a trail.
"The Moving Picture Girls Snowbound" by Laura Lee Hope
The snowplow has been along.
"The Curlytops and Their Playmates" by Howard R. Garis
The following morning the relieving snowplows arrived from the east, and Eaton felt it was the beginning of the end for him.
"The Blind Man's Eyes" by William MacHarg
The snowplow panted ahead of the school bus like a prehistoric monster.
"The Black Fawn" by James Arthur Kjelgaard
The snowplow service with one caboose was ordered out.
"Ralph, the Train Dispatcher" by Allen Chapman

In news:

Monday is " Snowplow Driver Appreciation Day" and Walker is using the occasion to remind drivers about being cautious when they encounter snowplows and to limit driving during bad weather.
A pickup truck with a snowplow fatally hit a 4-year-old boy in Western Wisconsin.
4-year-old killed in snowplowing accident .
A 4-year-old child was struck and killed in a snowplowing accident about noon Tuesday at a home in Star Prairie Township, the St Croix County sheriff's office said.
Snowplow Appreciation ' occasion reminds motorists to be cautious.
Doug McCarroll of the Wapello County Secondary Roads Department finished checking his snowplow Friday morning and headed out of the county garage to test his adjustments.
A snowplow clears a road.
Blizzard makes snowplows which are considered motor vehicle equipment.
4-year-old killed in snowplowing accident.
Caution is urged when passing a working snowplow, as it can create a cloud of snow that obscure a driver's vision.
Loudonville Council has second consecutive brief meeting, OKs selling snowplow.
In the market for a snowplow.
Snowplows have been out clearing the roads, but it's slippery, so be careful out there.
Drunk driving charges are pending in a Colorado city and they seem to be blaming it on a snowplow.
Connor Hedge wins Power-V XT Snowplow in sweepstakes.

In science:

The slightly shrunken, collapsing shell quickly accelerates to free-fall speed, while the expanding structure eventually decelerates at large radius as a momentum-conserving snowplow.
Trapped Protostellar Winds and their Breakout
As a knot moves through this slower gas, it will act as a snowplow and gain in mass.
The Nova Shell and Evolution of the Recurrent Nova T Pyxidis
In the opposite case, a deflagration propagates slower than the sound speed and piles up an overdensity of fluid in front of it, like a snowplow.
Gravitational Radiation From Cosmological Turbulence
Since in the snowplow phase the shock velocity drops rapidly, the dust destruction occurs mainly up to the end of the adiabatic expansion phase given by Eq. (15).
Evolution of interstellar dust and stardust in the solar neighbourhood
Molecular clouds form in the interstellar medium by instabilities, mainly during the compression of ISM material in the snowplow phase of SN shocks.
Evolution of interstellar dust and stardust in the solar neighbourhood