The Collaborative International Dictionary of English v.0.48:
flameproof \flameproof\ adj. not susceptible to burning; noncombustible; fireproof; -- of artifacts. Opposite of combustible. Syn: flame-retardant. [WordNet 1.5]WordNet (r) 3.0 (2006):
flameproof adj 1: resistant to catching fire [syn: flameproof, flame- retardant]