ˌdīəˈthərmənsē noun
or di·a·ther·ma·cy -məsē
( -es )
Etymology: 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 — more at warm
: the ability to transmit infrared radiation — compare athermancy