In geology:
* Earth's Crust: The outermost solid layer of the Earth, composed primarily of igneous, metamorphic, and sedimentary rocks. It's relatively thin compared to the Earth's mantle and core. There are two types:
* Continental Crust: Thicker and less dense, forming the continents.
* Oceanic Crust: Thinner and denser, forming the ocean floor.
In food:
* Bread Crust: The hard, browned outer layer of a loaf of bread.
* Pie Crust: The pastry shell that encases the filling of a pie.
* Pizza Crust: The base of a pizza, typically made from dough.
Other meanings:
* Crust on something: A hard, dry outer layer that forms on the surface of something, like a pot of soup or a frozen lake.
* Crustacean Shell: The hard outer covering of crustaceans like crabs, lobsters, and shrimp.
To understand the intended meaning of "crust," you need to consider the context of the sentence or phrase in which it is used.
