ambulacrum

American  

[am-byuh-lak-ruhm, -ley-kruhm] / ˌæm byəˈlæk rəm, -ˈleɪ krəm /

noun

plural

ambulacra

1. one of the radial areas in an echinoderm, as the sea urchin, bearing the tube feet by which the creature moves.

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ambulacrum British  

/ ˌæmbjʊˈleɪkrəm /

noun

1. 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

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Other Word Forms

• ambulacral adjective
• interambulacrum noun

Etymology

Origin of ambulacrum

1830–40; < New Latin, Latin: alley, walking place, equivalent to ambulā- (stem of ambulāre to walk) + -crum noun suffix denoting means