mesad

adverb
me·​sad | \ ˈmē-ˌzad How to pronounce mesad (audio) , -ˌsad How to pronounce mesad (audio) \
variants: also mesiad \ -​zē-​ˌad How to pronounce mesiad (audio) , -​sē-​ How to pronounce mesiad (audio) \

Medical Definition of mesad

: toward or on the side toward the mesial plane