spanner(redirected from throw a spanner in the works)
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a steel hand tool with a handle carrying jaws or a hole of particular shape designed to grip a nut or bolt head
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A wrench with a semicircular head having a projection or hole at one end.
A horizontal brace.
An artificial horizon attachment for a sextant.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
spanner, span piece
A horizontal cross brace or collar beam.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.