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sea urchin

3 ENTRIES FOUND:

sea urchin

noun

: a small sea animal that lives on the ocean floor and is covered in sharp spines

Full Definition of SEA URCHIN

:  any of numerous echinoderms (class Echinoidea) that are usually enclosed in thin brittle globular tests covered with movable spines

First Known Use of SEA URCHIN

1591

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