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limestone

noun
🔊/ˈlaɪmstəʊn/
🔊/ˈlaɪmstəʊn/
[uncountable]
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  1. a type of white rock that contains calcium, used in building and in making cement石灰岩
    Oxford Collocations DictionaryLimestone is used before these nouns:
    • cave
    • cliff
    • hill
    • …
    See full entry