ambulacrum

[ am-byuh-lak-ruhm, -ley-kruhm ]

noun

, plural am·bu·lac·ra [am-by, uh, -, lak, -r, uh, -, ley, -kr, uh].

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

ambulacrum

/ 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

Derived Forms

• ˌambuˈlacral, adjective

Other Words From

• ambu·lacral adjective
• inter·ambu·lacrum noun plural interambulacra

Word History and Origins

Origin of ambulacrum¹

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

Word History and Origins

Origin of ambulacrum¹

C19: from Latin: avenue, from ambulāre to walk