ambulacrum

ambulacrum

[am-byuh-lak-ruhm, -ley-kruhm]
noun, plural ambulacra [am-byuh-lak-ruh, -ley-kruh] .
one of the radial areas in an echinoderm, as the sea urchin, bearing the tube feet by which the creature moves.

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

ambulacral, adjective
interambulacrum, noun, plural interambulacra.
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World English Dictionary
ambulacrum (ˌæmbjʊˈleɪkrəm)
 
n , pl -ra
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]
 
ambu'lacral
 
adj

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