Relating to the mesial and buccal surfaces of a tooth; denoting especially the angle formed by the junction of these two surfaces. ... (05 Mar 2000) ... 
(me″ze-o-buk´әl) pertaining to or formed by the mesial and buccal surfaces of a tooth, or the mesial and buccal walls of a tooth cavity.
Type: Term Pronunciation: mē′zē-ō-bŭk′ăl Definitions: 1. Relating to the mesial and buccal surfaces of a tooth; denoting especially the angle formed by the junction of these two surfaces.
mesiobuccal A reference to or formed by the mesial and buccal surfaces of a tooth, or the mesial and buccal walls of a tooth cavity preparation.