Definition of adiathermic in English:

adiathermic

adjective

Physics
  • Of a substance, body, etc.: not diathermic; allowing no transfer of heat.

Origin

Mid 19th century. From a- + diathermic, after French adiathermique.

Pronunciation:

adiathermic

/ˌadɪəˈθəːmɪk//(ˌ)eɪdʌɪəˈθəːmɪk/