crab
n. countable A2 Elementary US //ˈkɹæb// UK //kɹˈæb// crab
n. a sea animal with a hard shell and ten legs, including two large claws. They usually walk sideways and live in or near the ocean.
n. a decapod crustacean typically characterised by a broad, flat carapace and five pairs of legs, the first of which is modified into pincers. Refers to various species within the infraorder Brachyura.
The children found a small crab hiding under a rock.
We spent the afternoon at the beach watching a crab scuttle sideways across the sand toward the water.
Commercial fishing for king crab remains a dangerous but lucrative industry in the cold waters of the North Pacific.
Usage
Countable when referring to the animal; often uncountable when referring to the meat as food.