ambulacrum
/ˌæmbjʊˈleɪkrəm/noun
(pl. ambulacra /-krə/)
- Zoology (in an echinoderm) each of the radially arranged bands, together with their underlying structures, through which the double rows of tube feet protrude【动】（棘皮动物）步带。
派生词
ambulacral
adjective词源
early 19th cent.: Latin， 'avenue'， from ambulare 'to walk'.