单词	mesial
释义	mesial adjective me·​si·​al ˈmē-zē-əl  -sē- 1 : middle, median 2 : 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 distal sense 2 mesially ˈmē-zē-ə-lē  -sē- adverb Word History First Known Use 1803, in the meaning defined at sense 1 Medical Definition mesial adjective me·​si·​al ˈmē-zē-əl  -sē-  variants also mesal -zəl  -səl  1 : being or located in the middle or a median part the mesial aspect of the metacarpal head 2 : situated in or near or directed toward the median plane of the body the heart is mesial to the lungs compare distal sense 1b 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 distal sense 1c, proximal sense 1b
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