a. [ Gr. 'a priv. + qermai`nein to heat, qe`rma heat: cf. F. athermane. ] (Chem.) Not transmitting heat; -- opposed to diathermanous. [ 1913 Webster ]

a. [ Gr. &unr_; to warm through; dia` through + &unr_; to warm, &unr_; warm. ] Having the property of transmitting radiant heat; diathermal; -- opposed to athermanous. [ 1913 Webster ]