Master of Dental Surgery
noun [ C ] medical UK specialized uk/ˌmɑː.stər əv ˈden.təl ˌsɜː.dʒər.i/ us/ˌmæs.tɚ əv ˌden.t̬əl ˈsɝː.dʒər.i/ (abbreviation MDS)
（美国）牙科硕士
an advanced college or university degree in dentistry (= the work of a dentist)