oyster

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oyster

(oi′stər)
n.
a. Any of several edible bivalve mollusks of the family Ostreidae, having a rough, irregularly shaped shell attached to the substrate in shallow marine waters. Oysters are widely cultivated for food.
b. Any of various similar or related bivalve mollusks, such as the pearl oyster.
intr.v. oys·tered, oys·tering, oys·ters
To gather, dredge for, or raise oysters.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
A bivalved mollusc which may be consumed raw or cooked
Health benefits Oysters are a natural source of iron, zinc and selenium, as well as vitamin B12
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

oyster

[AS. oistre]
A shellfish that, when eaten raw or only partially cooked, may be a source of hepatitis A virus and bacterial pathogens. See: diarrhea, travelers'
Medical Dictionary, © 2009 Farlex and Partners