travertine
/'trævәtin/
📖 中文释义
- n. [地]石灰华
📘 English Definition（英文释义）
- n. A white concretionary form of calcium carbonate,
- usually hard and semicrystalline. It is deposited from the water of
- springs or streams holding lime in solution. Extensive deposits exist
- at Tivoli, near Rome.