| 单词 | ambulacra |
| 释义 | ambulacrum /am-bū-lāˈkrəm or -lakˈrəm/noun (pl ambulāˈcra)A radial band in the shell of an echinoderm, bearing rows of pores through which the tube-feet protrude ORIGIN: L ambulācrum a walk, from ambulāre to walk ambulāˈcral adjective |
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