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sea urchin
 
Noun sea urchin has 1 sense
  1. sea urchin - shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells
    --1 is a kind of     echinoderm
    --1 is a member of Echinoidea, class Echinoidea
    --1 has particulars:
     edible sea urchin, Echinus esculentus; sand dollar; heart urchin
sea steps sea swallow sea symph sea tang sea tangle sea trifoly sea trout sea turtle sea urchin sea wolf sea wormwood sea wrack seabag seabass seabeach sandwort seabed seabird

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