- 1. Any one of numerous species of echinoderms of the order Echinoidea. Source: opted
- 2. n. shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells Source: wordnet
- 3. Any one of numerous species of echinoderms of the order Echinoidea. Note: When living they are covered with movable spines which are often long and sharp. Source: webster
- 4. Any one of numerous species of echinoderms of the orderEchinoidea. Source: adambom
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sea urchin
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echinodermsnumerousspeciesechinoideaorderbodiescoveredenclosedglobularlivinglongmovablenotesharpshellssoftspinesspinytheythin
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