noun

limestone

limestone

The building is made of limestone.

The building is made of limestone.

Limestone is a common sedimentary rock.

Limestone is a common sedimentary rock.

((a/the)) limestone a type of sedimentary rock The building is made of limestone.

Synonyms: none (it's a specific type of rock)

A compound of 'lime' (calcium oxide/hydroxide) and 'stone'. Literally 'stone containing lime'.

Picture the white cliffs of Dover or ancient monuments, which are often made of this white, chalky stone.

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