• (n.) The doctrine or the phenomena of the transmission of radiant heat.
Di`a·ther'ma·nism noun The doctrine or the phenomena of the transmission of radiant heat. Nichol. 
diathermanism The doctrine or the phenomena of the transmission of radiant heat. Thermo Quiz #1 to check your thermo-word knowledge. Thermo Quiz #2 to check more of your thermo-word knowledge. Thermo Quiz #3 for additional thermo-words. Related 'heat, hot' word units: ferv-; pyreto-. ...