sprinkler head
noun
: the outlet of a sprinkler system that is usually a valve held closed by a strut having separable parts joined with solder of a predetermined melting point (such as 160°F) that fuses when exposed to fire temperatures and allows the head to open or by a quartz bulb containing a liquid that expands when heated and bursts the bulb
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“Sprinkler head.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sprinkler%20head. Accessed 28 Nov. 2024.
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