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 (ăm′byə-lăk′rəm, -lā′krəm)
n. pl. am·bu·lac·ra (-lăk′rə, -lā′krə)
One of the five radial areas on the undersurface of the starfish and similar echinoderms, from which the tube feet are protruded and withdrawn.

[Latin ambulācrum, walk planted with trees, from ambulāre, to walk; see ambhi in Indo-European roots.]

am′bu·lac′ral adj.


n, pl -ra (-rə)
(Zoology) 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]
ˌambuˈlacral adj


(ˌæm byəˈlæk rəm, -ˈleɪ krəm)

n., pl. -lac•ra (-ˈlæk rə, -ˈleɪ krə)
one of the radiating surface areas in echinoderms, through which the tube feet protrude during movement.
[1830–40; < New Latin, Latin: alley, walking place =ambulā(re) to walk (see amble) + -crum n. suffix denoting means]
am`bu•lac′ral, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ambulacrum - one of the five areas on the undersurface of an echinoderm on which the tube feet are locatedambulacrum - one of the five areas on the undersurface of an echinoderm on which the tube feet are located
echinoderm - marine invertebrates with tube feet and five-part radially symmetrical bodies
body part - any part of an organism such as an organ or extremity
References in periodicals archive ?
Nutritional particles are caught by ambulacral tentacles located along the entire length of the ambulacrum.
Thus, it became a veritable "mine" for the construction of the new architectonic complex, clear proof of which we find in the "refuse tip" containing spolia recovered a mere couple of years ago at the former army quarters of Saint Raphael (Torreras 2009; Fuertes, Rodero & Ariza, 2007), located halfway between both buildings and including several seamed voussoirs from the vault of the ambulacrum, as well as some pieces carved in grey micritic limestone with a very peculiar physiognomy, and perhaps formerly part of the enclosed seats of honour of the proedia (Murillo et al, 2010a, 262-284, fig.
De estos espacios, el mas intensamente museizado es el del foro donde, entre otras actuaciones, se ha reconstruido una parte del ambulacrum (Aquilue y Tremoleda 2011).
Todas ellas cuentan con un modulo y dimensiones similares; poseen, como ya se ha indicado, un criptoportico en uno de sus lados y responden a un modelo de tres naves con ambulacrum (Rascon y Sanchez, 2009: 814) como en el caso del edificio de Contributa.