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English definition of “clinker”

clinker

noun [C or U] (POWDER)    /ˈklɪŋ.kər/ US  /-kɚ/
the ash (= powder) and rough hard pieces that remain after coal has been burnedProducts of fire
(Definition of clinker noun (POWDER) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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