am·bu·lac·rum ( m by -lk rm, -l krm)n. pl. am·bu·lac·ra (-l kr, -lkr) 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radial areas on the undersurface of the starfish and similar echinoderms, from which the tube feet are protruded and withdrawn.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 ambul crum, walk planted with trees, from ambulre, to walk; see ambhi in Indo-European roots.]am bu·lacral adj. |
ambulacrum [ˌæmbjʊˈleɪkrəm]
n pl -ra [-rə]
(Life Sciences & Allied Applications / 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
[from Latin: avenue, from ambulāre to walk]
ambulacral adj
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  ambulacrum - one of the five areas on the undersurface of an echinoderm on which the tube feet are locatedechinoderm - marine invertebrates with tube feet and five-part radially symmetrical bodies body part - any part of an organism such as an organ or extremity |
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