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spark arrester

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noun
  1. a device, consisting of wire netting or other material, used to stop or deflect sparks thrown from an open fireplace, a smokestack, or the like.
  2. Electricity. a device to reduce sparking at contacts where a circuit is opened and closed.

Origin of spark arrester

An Americanism dating back to 1825–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
spark arrester in Science

spark arrester

[spärk]
  1. A device designed to keep sparks from escaping, as at a chimney opening or where materials are being welded.
  2. A device used to control or curtail electric sparking at a point where a circuit is made or broken.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.