sea urchin

Từ điển WordNet v3.1 - WordNet Dictionary

noun

shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells
• Hypernyms:
echinoderm
• Hyponyms:
edible sea urchin, Echinus esculentus, sand dollar, heart urchin
• Member Holonyms:
Echinoidea, class Echinoidea