rock milk
noun
a white, powdery surface crust of calcite, formed by efflorescence in limestone caves and fissures.
Also called
agaric mineral.
Origin of rock milk
First recorded in 1795–1805
Words nearby rock milk
rock jock,
rock lobster,
rock maple,
rock mechanics,
rock melon,
rock milk,
rock of gibraltar,
rock oil,
rock pigeon,
rock plant,
rock rabbit