ambulacrum

n., pl., -lac·ra (-lăk'rə, -lā'krə).
One of the five radial areas on the undersurface of the starfish and similar echinoderms, from which the tube feet are protruded and withdrawn.

[Latin ambulācrum, walk planted with trees, from ambulāre, to walk.]

ambulacral am'bu·lac'ral adj.

1. Atrium, court, or parvis, sometimes with a fountain in the centre, surrounded by arcades or colonnades, and often planted with trees, in front of a basilica.

2. Any walk or avenue with formally arranged tree-planting.

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The noun has one meaning:

Meaning #1: one of the five areas on the under surface of an echinoderm on which the tube feet are located

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