탄산칼슘을 주성분으로 하는 퇴적암의 한 종류로, 건축 자재나 시멘트 제조의 원료로 널리 쓰임.
A type of sedimentary rock composed primarily of calcium carbonate, often used as a building material or as a raw ingredient in making cement.
예문:
"The ancient cathedral was built using high-quality limestone from a nearby quarry."
"Over millions of years, water carved deep caves into the limestone layers of the mountain."