olemus
Wiktionary:
11. a master's degree; a type of postgraduate degree, usually undertaken after a bachelor degree
She has a master in psychology.
Synonyms: masters, master's, magistrate (Quebec English)
12. a person holding such a degree
He is a master of marine biology.

näiteid
Master of Law -- õigusteaduse magister
Master of Patent Law-- patendiõiguse magister

ülevaateid
https://en.wikipedia.org/wiki/Master%27s_degree