limestone B2 Topic:General Vocabulary Also spelled lime-stone US /ˈlaɪmˌstoʊn/ UK /ˈlaɪmˌstəʊn/ See IPA manual Freq #18626 Meanings 1 noun An abundant rock of marine and freshwater sediments; primarily composed of calcite (CaCO₃); and occurring in a variety of forms, both crystalline and amorphous. A limestone viaduct. 2 noun a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals Thesaurus Synonyms 1 noun · an abundant rock of marine... calcium carbonatelime Etymology From lime + stone. Topics General Vocabulary External links Google Images Cambridge Dictionary Wiktionary # limestone **Type:** Word **Level:** B2 **Part of speech:** noun **IPA (US):** /ˈlaɪmˌstoʊn/ **IPA (UK):** /ˈlaɪmˌstəʊn/ **Frequency rank:** 18626 ## Meanings 1. An abundant rock of marine and freshwater sediments; primarily composed of calcite (CaCO₃); and occurring in a variety of forms, both crystalline and amorphous. 2. a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals ## Examples - A limestone viaduct. ## Etymology From lime + stone. ## Topics - General Vocabulary markdown