Related topics: Nurses, doctors, etc, Army
M.O. (also MO British EnglishBrE) /ˌem ˈəʊ $ -ˈoʊ/ noun 1. [singular]WAY/MANNER (modus operandi) a way of doing something that is typical of a particular person or group 典型的做事方式,一贯的做法
2. [countableC] especially British EnglishBrEMNPMA (medical officer) an army doctor 医官,军医