Arrestor (noun)
alternative form of arrester
Arrester (noun)
One who places another under arrest.
Arrester (noun)
A device that stops or prevents, such as a railway buffer, or a spark arrester that prevents sparks from being released to start fires.
Wiktionary
Arrester (noun)
a device which prevents or stops a specified thing
“a spark arrester”
Arrester (noun)
a device on an aircraft carrier that slows down aircraft after landing by means of a hook and cable.
Oxford Dictionary