noninflammable

adjective
non·​in·​flam·​ma·​ble | \ ˌnän-in-ˈfla-mə-bəl How to pronounce noninflammable (audio) \

Definition of noninflammable

: not inflammable : nonflammable … one of the very first airships to use noninflammable helium.— Bob Marcotte a noninflammable solvent

First Known Use of noninflammable

1817, in the meaning defined above

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