spark arrester

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.

spark arrester

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.

Word History and Origins

Origin of spark arrester¹

An Americanism dating back to 1825–35