smoke alarm

smoke detector

noun
an electronic fire alarm that is activated by the presence of smoke.
Also called smoke alarm.


Origin:
1925–30

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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WordNet
smoke alarm

noun
an alarm that is tripped off by fire or smoke [syn: fire alarm
WordNet® 3.0, © 2006 by Princeton University.
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00:10
smoke alarm is always a great word to know.
So is gobo. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
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