柯林斯詞典calcium carbonate 1. N a white crystalline salt occurring in limestone, chalk, marble, calcite, coral, and pearl: used in the production of lime and cement. Formula: CaCO3 碳酸鈣 返回 calcium carbonate劍橋詞典a common , white chemical compound found naturally as chalk , marble , and limestone , and in bones and shells , etc. 碳酸鈣 返回 calcium carbonate