ambulacrum

am·bu·lac·rum

A0246000 (ăm′byə-lăk′rəm, -lā′krəm)n. pl. am·bu·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radial areas on the undersurface of the starfish and similar echinoderms, from which the tube feet are protruded and withdrawn.

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

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am′bu·lac′ral adj.

ambulacrum

(ˌæmbjʊˈleɪkrəm) n, pl -ra (-rə) (Zoology) any of five radial bands on the ventral surface of echinoderms, such as the starfish and sea urchin, on which the tube feet are situated[C19: from Latin: avenue, from ambulāre to walk] ˌambuˈlacral adj

am•bu•lac•rum

(ˌæm byəˈlæk rəm, -ˈleɪ krəm)

n., pl. -lac•ra (-ˈlæk rə, -ˈleɪ krə) one of the radiating surface areas in echinoderms, through which the tube feet protrude during movement. [1830–40; < New Latin, Latin: alley, walking place =ambulā(re) to walk (see amble) + -crum n. suffix denoting means] am`bu•lac′ral, adj.

Thesaurus

Noun

1.

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