| 释义 |
echinoderm/iˈkainə(ʊ)dɜ:m, ˈekin-/n. any marine invertebrate of the phylum Echinodermata, which includes starfishes, sea urchins, brittle-stars, crinoids, and sea cucumbers, typically having five-fold symmetry, a calcareous skeleton, and tube feet operated by water pressure 棘皮动物(海洋中的无脊椎动物，包括海星、海胆、海蛇尾、海百合、海参等，其特征为五辐对称结构，石灰质骨胳和由水压驱动的管足) [ECHINUS + Greek derma -atos ‘skin’] |