un ‧ der ‧ floor heat ‧ ing /ˌʌndəflɔː ˈhiːtɪŋ $ ˌʌndərflɔːr-/ BrE AmE noun [uncountable]
a heating system that is designed to go under the floor in a building
un ‧ der ‧ floor heat ‧ ing /ˌʌndəflɔː ˈhiːtɪŋ $ ˌʌndərflɔːr-/ BrE AmE noun [uncountable]
a heating system that is designed to go under the floor in a building
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012