Until now, no one has made similar hollow structures out of metals.

A dome had stood over it, a hollow structure with three arched doorways.

A cavity is a walled hollow structure within the lungs.

The builders needed a hollow airtight structure that would keep the water out while they moved lower.

Three species develop bullate leaves which are hollow root-filled structures.

In some cases, the removed esophagus is replaced by another hollow structure, such as the patient's colon.

He was forced to maintain an increasingly hollow structure by politicians intent on cutting expenditure.

To a large extent, however, these were hollow structures and by 1931 the 3rd Division's overall establishment was just 4,505 men all ranks.

Within the hollow structure, beams of light outlined paths for vehicles to take.

In the case of shells that have an umbilicus, the columella is a hollow structure.