heat retention
nounUK /hiːt rɪˈtɛnʃən/
US /hiːt rɪˈtɛnʃən/
Heat retention is when something keeps heat inside and does not let it go away.
The thick walls of the house give it good heat retention in winter.
OTHER MEANINGS
2. The ability of a material or building to hold warmth for a long time.
Wool has excellent heat retention, which is why it makes warm sweaters.
3. In cooking, the way a pot or lid keeps food hot after cooking.
A heavy cast-iron pot has great heat retention, so the stew stays hot.
4. In science, the trapping of heat by gases in the atmosphere.
Carbon dioxide increases heat retention in Earth's atmosphere.