A dolphin in this context refers to a modular, sturdy, and compact maritime structure which comprises a concentrated cluster of piles. These units are meticulously driven closely into the seafloor to create a steadfast and unyielding assembly. In a bid to enhance its robustness and cohesion, they are firmly interconnected and bound together using durable wire cables. This unified structure assists in protecting and preserving other marine infrastructures such as piers or bridges from potential watercraft collisions, while also serving as mooring, berthing or navigational aids at harbors and waterways.

1. To prevent collision damage from boats at the harbor, a dolphin was constructed at the entrance. 2. In order to prevent further erosion of the riverbank, they decided to erect a dolphin for reinforcement. 3. For the construction of the new bridge, multiple dolphins were needed to assure the stability of the structure in the deep waters. 4. Dolphins are commonly used in the construction of marine structures like piers and jetties, providing a solid base in the water for the structures above. 5. To protect the offshore wind turbines from potential damage from passing ships, the engineering team had to install a series of dolphins around each turbine.

Dolphin structures are not just exclusive to the environments of marine animals. They also refer to a unique architectural term. In the world of construction and engineering, a "dolphin" is actually a name given to a man-made structure that consists of a group of piles driven close together and bound with wire cables to form a single, strong structure. These structures are often used in marine environments for protection, mooring ships or for supporting bridges or other large infrastructures. Their interesting name is said to have originated from the similarities between their arrangement in the water and the swimming patterns observed in groups of dolphins. This unique combination of construction techniques is lauded for its exceptional sturdiness and resilience even under challenging conditions, similarly to the dynamic strength and agility that dolphins exhibit in their natural habitats.