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Related to rider: free rider
1. an additional clause, amendment, or stipulation added to a legal or other document, esp (in Britain) a legislative bill at its third reading
2. Brit a statement made by a jury in addition to its verdict, such as a recommendation for mercy
3. a small weight that can be slid along one arm of a chemical balance to make fine adjustments during weighing
4. Geology a thin seam, esp of coal or mineral ore, overlying a thicker seam
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
a wire weight of several milligrams, used for precise weighing on an analytical balance. By moving the rider along the balance beam, it is possible to vary the load from fractions of a milligram to 10 mg.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
A piece of type that is raised higher than surrounding type, and tends to make a heavier impression on the paper.
A steel or iron crossbeam which slides between the guides in a sinking shaft; it is carried by the hoppit and serves to guide and steady the hoppit during its movement up and down the shaft.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.