Meaning of adiathermic in English:
adiathermic
adjective
Physics
Of a substance, body, etc.: not diathermic; allowing no transfer of heat.
Pronunciation
adiathermic
/(ˌ)eɪdʌɪəˈθəːmɪk/ /ˌadɪəˈθəːmɪk/ Origin
Mid 19th century. From a- + diathermic, after French adiathermique.