Sea urchin

//ˈsi ˌɝtʃɪ̈n// noun

Definitions

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

    "1986, Patrick S. Leahy, Chapter 1: Laboratory Culture of Strongylocentrotus purpuratus Adults, Embryos, and Larvae, Thomas E. Schroeder (editor), Methods in Cell Biology, Volume 27: Echinoderm Gametes and Embryos, page 2, Of the many species of sea urchins utilized in biological research today the most widely used in North America is probably the purple sea urchin, Strongylocentrotus purpuratus."

  2. 2
    shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells wordnet

Etymology

From sea + urchin (“hedgehog”), reflecting a similarity in appearance to a hedgehog.

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