ultracool
- a word derived from cool.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
"While the sun is a bright, yellow dwarf star, TRAPPIST-1 is an ultracool red dwarf, meaning it is significantly smaller, cooler and dimmer than our sun," he explained.
From Science Daily ● Dec. 12, 2025
Yet because the star LHS 3154 is an "ultracool" star, the HPF was able to detect it — and, consequently, the unusually massive planet that orbits it.
From Salon ● Nov. 30, 2023
In 2021 Ferlaino and her team found that warming an ultracool quantum fluid of the magnetic rare earth element dysprosium could solidify it into a supersolid's distinctive peaks.
From Scientific American ● Jul. 31, 2023
The caption says “their ultracool QB has transformed the Bengals’ vibe.”
From Seattle Times ● Aug. 17, 2022
I wanted to hear a big voice on the phone say “Yea, verily, this is me, God. It’s all good, my man, and will be ultracool in the end. Don’t worry about it.”
From "Bad Boy" by Walter Dean Myers
