Etymology:
"Sea urchin" is derived from Middle English "see urchyn," meaning "hedgehog of the sea," which is a translation of Late Latin "echinus marinus."
Meaning:
A sea urchin is a marine invertebrate belonging to the class Echinoidea. They are characterized by their spherical or flattened bodies covered in movable spines.
Origin:
The earliest known sea urchins date back to the Ordovician period (485-444 million years ago). They have evolved over time to occupy diverse habitats in shallow waters to deep-sea environments.
Linguistic Relatedness:
Latin: * "Echinus": Hedgehog, sea urchin
Greek: * "Echinos": Hedgehog, sea urchin
Romance Languages: * French: "Oursin de mer" * Italian: "Riccio di mare" * Spanish: "Erizo de mar"
Germanic Languages: * Dutch: "Zee-egel" * German: "Seeigel" * Swedish: "Sjötborre"
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Etymology habitat n mid 17th century from French habitat from Latin habitare dwel
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