from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Not transmitting heat.
from the GNU version of the Collaborative International Dictionary of English
- adj. Not transmitting heat; -- opposed to
from The Century Dictionary and Cyclopedia
- Impermeable to radiant heat; having the power of stopping radiant heat; opaque to heat.
Ancient Greek privative + to heat: compare French athermane. (Wiktionary)
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