Definition for OYS'TER

OYS'TER, n. [G. auster; D. oester; Sw. ostra; Dan. öster, Fr. huitre; Arm. histrenn or eistren; Russ. ystritz; Corn. estren; L. ostrea; Gr. οστρεον; probably connected in origin with οστεον, bone, and named from its hardness.]

A bivalvular testaceous animal, found adhering to rocks or other fixed substances in salt water which is shallow, or in the mouths of rivers. Oysters are deemed nourishing and delicious food.

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