n 1 a  :  a piece of furniture on or in which one may lie and sleep - see HOSPITAL BED   b  :  the equipment and services needed to care for one hospitalized patient  2  :  a layer of specialized or altered tissue esp. when separating dissimilar structures <a of vigorous granulation tissue is essential for a satisfactory skin graft>  - see NAIL BED VASCULAR BED  .
 
 
 
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