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diathermancy

noun
di·​a·​ther·​man·​cy | \ ˌdīəˈthərmənsē\
variants: or diathermacy \ -​məsē \
plural -es

Definition of diathermancy

: the ability to transmit infrared radiation — compare athermancy

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History and Etymology for diathermancy

diathermancy from French diathermansie, from Greek dia- + thermansis heating, from thermainein to heat, from thermos hot; diathermacy from French diathermasie, from Greek diathermasia heating effect, from diathermainein to heat through, from dia- + thermainein

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