Definition of Sea urchin

1. Noun. Shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells.

Generic synonyms: Echinoderm
Group relationships: Class Echinoidea, Echinoidea
Specialized synonyms: Echinus Esculentus, Edible Sea Urchin, Sand Dollar, Heart Urchin

Definition of Sea urchin

1. Noun. Any of many marine echinoderms, of the class ''Echinoidea'', commonly found in shallow water, having a complex chewing structure named Aristotle's lantern ¹

¹ Source: wiktionary.com

Medical Definition of Sea urchin

1. Any one of numerous species of echinoderms of the order Echinoidea. When living they are covered with movable spines which are often long and sharp. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Sea Urchin

sea titling
sea toad
sea toads
sea trial
sea trials
sea trifoly
sea trout
sea trumpet
sea trumpets
sea turn
sea turns
sea turtle
sea turtles
sea unicorn
sea unicorns
sea urchin (current term)
sea urchin granuloma
sea urchins
sea vegetable
sea wall
sea wasp
sea water
sea whip
sea whip coral
sea widgeon
sea willow
sea willows
sea wing
sea wolf
sea wood louse

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