1.  oyster(n = noun.animal) - marine mollusks having a rough irregular shell; found on the sea bed mostly in coastal waters;
is a kind of bivalve, lamellibranch, pelecypod
has parts: huitre, oyster
is a member of family ostreidae, ostreidae
has particulars: seed oyster, blue point, bluepoint, japanese oyster, ostrea gigas, virginia oyster, pearl oyster, pinctada margaritifera, anomia ephippium, saddle oyster, capiz, placuna placenta, window oyster, windowpane oyster
Derived form verb oyster₁

2.  oyster(n = noun.food) huitre - edible body of any of numerous oysters;
is a kind of shellfish
is a part of oyster
has particulars: oysters rockefeller, blue point, bluepoint
Derived form verb oyster₁

3.  oyster(n = noun.food) - a small muscle on each side of the back of a fowl;
is a kind of helping, portion, serving
is a part of bird, fowl

   oyster(v = verb.contact) - gather oysters, dig oysters;
is one way to collect, garner, gather, pull together
Derived forms noun oyster₁, noun oyster₂
Sample sentences: In the summer they like to go out and oyster

1.  Any marine bivalve mollusk of the genus Ostrea. They are usually found adhering to rocks or other fixed objects in shallow water along the seacoasts, or in brackish water in the mouth of rivers. The common European oyster (Ostrea edulis), and the American oyster (Ostrea Virginiana), are the most important species. [1913 Webster]

2.  A name popularly given to the delicate morsel contained in a small cavity of the bone on each side of the lower part of the back of a fowl. [1913 Webster]

oyster, n.
1 any of various bivalve molluscs of the family Ostreidae or Aviculidae, esp. an edible kind, Ostrea edulus, of European waters.
2 an oyster-shaped morsel of meat in a fowl's back.
3 something regarded as containing all that one desires (the world is my oyster).
4 (in full oyster-white) a white colour with a grey tinge.

Idiom:
oyster-bank (or -bed) a part of the sea-bottom where oysters breed or are bred. oyster-catcher any usu. coastal wading bird of the genus Haematopus, with a strong orange-coloured bill, feeding on shellfish. oyster-farm an area of the seabed used for breeding oysters. oyster-plant
1 = SALSIFY.
2 a blue-flowered plant, Mertensia maritima, growing on beaches.

Etymology:
ME & OF oistre f. L ostrea, ostreum f. Gk ostreon

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japanese oyster, oyster agaric, oyster bank, oyster bar, oyster bed, oyster catcher, oyster crab, oyster cracker, oyster dressing, oyster fish, oyster fungus, oyster mushroom, oyster park, oyster plant, oyster shell, oyster stew, oyster stuffing, pearl oyster, saddle oyster, seed oyster, spanish oyster plant, vegetable oyster, virginia oyster, window oyster, windowpane oyster