living rock
noun
mass noun
1- rock that is not detached but still forms part of the earth原生岩石, 未经开采的岩石：
a chamber cut out of the living rock.
在原生岩石中开挖出的一个房间。
1.1
- natural rock placed in an aquarium as a habitat for sessile organisms（水族馆中用作静止生物体栖息地的）天然岩石。