apyrous

Not combustible; capable of tolerating great heat without alteration of form or properties.

Adjective

  1. Not combustible; capable of tolerating great heat without alteration of form or properties.
    • The Lumincus [sic] Lamp of Progression, whose sciatherical shadows falling upon earthly matter, not promoting sciolism, or Siccity, may it illumine humanity as it tardigradely floats from matter's aquius wastes, to...

Origin

From a- + pyro- + -ous.