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me·sio·dis·tal .mē-zē-ō-'dis-təl adj of or relating to the mesial and distal surfaces of a tooth esp relating to, lying along, containing, or being a diameter joining the mesial and distal surfaces <\mesiodistal length>
me·sio·dis·tal·ly -ē adv
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me·sio·dis·tal (me″ze-o-disґtəl) pertaining to the mesial and distal surfaces of a tooth.Medical dictionary. 2011.