Ambulacrum (noun) Definition, Meaning & Examples

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noun, plural am·bu·lac·ra [am-byuh-lak-ruh, -ley-kruh]. /ˌæm byəˈlæk rə, -ˈleɪ krə/.
  1. one of the radial areas in an echinoderm, as the sea urchin, bearing the tube feet by which the creature moves.
noun plural -ra (-rə)
  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
Ambulacrum (noun) Definition, Meaning & Examples

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