rocker


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rocker

1. any of various devices that transmit or operate with a rocking motion
2. a steel tool with a curved toothed cage, used to roughen the copper plate in engraving a mezzotint
3. 
a. an ice skate with a curved blade
b. the curve itself
4. Skating
a. a figure consisting of three interconnecting circles
b. a half turn in which the skater turns through 180?, so facing about while continuing to move in the same direction
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

rocker

[′räk·ər]
(civil engineering)
A support at the end of a truss or girder which permits rotation and horizontal movement to allow for expansion and contraction.
(graphic arts)
A type of chisel, with a sharp beveled edge, used in mezzotint engraving; it is set on the surface of a copper plate and rocked back and forth to produce a rough grain, which, when printed, produces a velvety black.
(mining engineering)
A small digging bucket mounted on two rocker arms in which auriferous alluvial sands are agitated by oscillation, in water, to collect gold.
(ordnance)
Movable, built-in support in a field gun carriage, between the trail and the cradle, that allows changes in elevation to be made without disturbing the angle of position setting.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
King recently said that another crack at the Grand National was unlikely after West End Rocker became upset at the start before this year's race.
At the age of seventeen Rocker joined the German Social Democratic Party, but soon became critical of its rigid and authoritarian ethos and its statist politics, that derived essentially from the Marxists Friedrich Engels and Ferdinand Lassalle.
He said it was from the band that he learnt what it really meant to be a rocker. 'It is not only about the dress code, it is about discipline and helping people in the society,' he said.
Inspection IAW SA-167 found cylinder numbers 2 and 4 intake and exhaust pushrods and rocker arms were abnormally worn.
At this moment, valves, bridges, rocker arms and camshaft are in solid contact.
The Baby Rocker is also in Patent Pending status within the United States Patent and Trademark Office.
Kossoff's three stories--of Rocker, the anarchists and the city--are wrapped thematically by a concern with the effects of urban renewal on cultural memory.
The album was credited as the "turning point" in the rocker's career.
In a column for World Net Daily, a far-right site that has published columns by Michael Savage and Rick Santorum, Rocker shared his views on multiple fronts.
Anyway, King obviously took heed because he not only entered West End Rocker for the 2011 Grand National but ran him in it, too.