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The Collaborative International Dictionary
Diathermal

Diathermal \Di`a*ther"mal\, a. [Gr. ? thoroughly warm; dia` through + ? warm, hot. Cf. Diathermous.] Freely permeable by radiant heat.

Wiktionary
diathermal

a. Freely permeable by radiant heat.

Wikipedia
Diathermal

Diathermal or diathermic may refer to:

  • Related to diathermy, e.g., diathermic therapy
  • Diathermal wall, in thermodynamics, allowing (only) heat transfer
  • Diathermal oil, oil used for heat transfer