ambulacrum

American  

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

noun

ambulacra plural

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

---

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

---

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