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oyster

oys·ter

oyster

pronunciation:
oI str
features:
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part of speech: noun
definition: a small animal with a soft body and a hard shell in two pieces. Oysters have a rough shell with a very shiny inside, where pearls sometimes grow. Oysters live in shallow ocean water. They are mollusks and are closely related to clams and mussels. People eat some kinds of oysters.
 
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  invertebrate, mollusk, ocean