The Collaborative International Dictionary
Athermancy
Athermancy \A*ther"man*cy\ ([.a]*th[~e]r"m[a^]n*s[y^]), n. [See
Athermanous.]
Inability to transmit radiant heat; impermeability to heat.
--Tyndall.
Wiktionary
athermancy
n. Inability to transmit radiant; impermeability to heat.