Crossword clue: the property of transmitting radiant heat; the quality of being diathermous. melloni.

The most common answer is diathermancy (12 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

diathermancy 12 letters web-def

The property of transmitting radiant heat; the quality of being diathermous. Melloni.

diathermaneity 14 letters web-def

The property of transmitting radiant heat; the quality of being diathermous. Melloni.