acadian
n. C2 Proficiency aca·di·an
n. a type of rock that is very hard and made of tiny, flat pieces of minerals. It is often found in parts of Canada and is used to build strong roads and buildings.
n. a fine-grained, metamorphic rock consisting of interlocking grains of quartz and feldspar. It is typically formed by the metamorphism of granite or granodiorite and is characterized by its hardness and durability.
The road is paved with acadian rock.
Engineers chose acadian for the bridge because it can withstand heavy traffic and extreme weather conditions.
Geologists identified the acadian as a primary component of the mountain range, noting its high resistance to erosion and its role in stabilizing the local terrain.
First attested in 1705. From Acadia + -n (“one that is”).