ambulacrum

am·bu·lac·rum  (mby-lkrm, -lkrm)

n. pl. am·bu·lac·ra (-lkr, -lkr)

One of the five radial areas on the undersurface of the starfish and similar echinoderms, from which the tube feet are protruded and withdrawn.

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[Latin ambulcrum, walk planted with trees, from ambulre, to walk; see ambhi in Indo-European roots.]

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ambu·lacral adj.

Thesaurus

Noun

1.

ambulacrum - one of the five areas on the undersurface of an echinoderm on which the tube feet are located echinoderm - marine invertebrates with tube feet and five-part radially symmetrical bodies body part - any part of an organism such as an organ or extremity