also  me*sal  adj 1  :  being or located in the middle or a median part <the aspect of the metacarpal head>   2  :  situated in or near or directed toward the median plane of the body <the heart is to the lungs>  - compare DISTAL1b    3  :  of, relating to, or being the surface of a tooth that is next to the tooth in front of it or that is closest to the middle of the front of the jaw - compare DISTAL1c PROXIMAL1b   me*si*al*ly adv 
 
   
 
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