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oyster

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noun oys·ter \ˈȯis-tər\

Simple Definition of oyster

  • : a type of shellfish that has a rough shell with two parts and that is eaten both cooked and raw

Full Definition of oyster

  1. 1 a :  any of various marine bivalve mollusks (family Ostreidae) that have a rough irregular shell closed by a single adductor muscle and include commercially important shellfish b :  any of various mollusks resembling or related to the oysters

  2. 2 :  something that is or can be readily made to serve one's personal ends <the world was her oyster>

  3. 3 :  a small mass of muscle contained in a concavity of the pelvic bone on each side of the back of a fowl

  4. 4 :  an extremely taciturn person

  5. 5 :  a grayish-white color

Origin of oyster

Middle English oistre, from Anglo-French, from Latin ostrea, from Greek ostreon; akin to Greek ostrakon shell, osteon bone — more at osseous


First Known Use: 13th century

Rhymes with oyster




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