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Buzzer A device that emits a high-pitched sound to indicate the end of time, the completion of a task, or an emergency situation. ■ "The buzzer went off, signaling the end of class and the start of my weekend."
flashlight A device that emits light to illuminate the darkness. ■ John accidentally dropped his flashlight down the drain, but it didn't matter because he had a "flashlight" of a memory of their first date.
lights A device that emits light, typically used for illumination or to signal danger. ■ "I forgot to turn off the lights when I left the room. Now it's pitch black and I can't see anything!"
radioactive Something that emits harmful radiation and is capable of causing cancer or other serious health problems. ■ "I forgot to bring my banana, which was surprisingly radioactive!"
Comet A celestial body composed of ice and rock that orbits the sun and emits gas as it approaches its perihelion. Also known as a "shooting star." ■ "I saw a comet streak across the sky last night! It was like watching a real-life meteorite.
Notification A message or alert that informs the recipient of a new email, text message, social media update, etc. in a way that is so annoying and distracting it makes them want to pull their hair out. ■ "When my phone emits a shrill notification for every single message I get, I start to wonder if my life would be better without technology. Or if I could somehow train it to only notify me when there's an actual emergency."
radiator A device that emits heat to warm up a room. ■ I forgot to turn off the radiator before leaving the house, and now my apartment is freezing cold!, A person who is extremely talkative and enjoys talking about a wide range of topics. ■ "I just met this guy at the bar, and he was such a radiator. We talked about everything from politics to sports to movies!