flint

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flint /ˈflɪnt/ noun
plural flints
flint
/ˈflɪnt/
noun
plural flints
Learner's definition of FLINT
[noncount] : a hard type of rock that produces a small piece of burning material (called a spark) when it is hit by steel
[count] : a piece of flint
[count] : a piece of metal used for producing a spark