flame-retardant

adjective
flame-re·​tar·​dant | \ ˈflām-ri-ˌtär-dᵊnt How to pronounce flame-retardant (audio) \

Definition of flame-retardant

: made or treated so as to resist burning

First Known Use of flame-retardant

1947, in the meaning defined above

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The first known use of flame-retardant was in 1947

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