Definitions

1. noun

A groove or series of grooves on an animal, typically a starfish, used for the movement of its tube feet.

“The ambulacrum of the starfish allowed it to slowly move across the ocean floor.”

2. noun

A passageway or a series of grooves in a structure, especially in the fossilized remains of ancient animals, used for the movement of organisms or for the exchange of nutrients and waste.

“The fossilized ambulacrum of the ancient sea creature was an important discovery in the field of paleontology.”

3. noun

A passageway or a series of grooves in a structure, especially in buildings or in the human body, used for the movement of air, water, or other substances.

“The ambulacrum in the ancient building was designed to provide a flow of air for the occupants.”