sea urchin
From Wiktionary, the free dictionary
Etymology
From sea + urchin (“hedgehog”), reflecting a similarity in appearance to a hedgehog.
Pronunciation
Noun
sea urchin (plural sea urchins)
- 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.
- 2001, V. L. Kasyanov, Reproductive Strategy of Marine Bivalves and Echinoderms, page 90:
- The pericentriolar radial complex characteristic of the spermatozoa of other echinoderms is lacking in the spermatozoa of all sea urchins.
- 2004, Belinda J. Sly, The Development and Evolution of the Echinoderm Nervous System, page 9:
- Approximately 20% of sea urchins are direct-developers, meaning that they bypass the pluteal larval stage and develop directly into an adult sea urchin.
- 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,
Hypernyms
- (sea urchin): echinoid
Translations
any of many marine echinoderms of the class Echinoidea
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See also
Anagrams
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