Sub-fusc
Sub-fusc, meaning of a dark or dusky colour (originally a dark brown) is now used to refer to the clothing members of Oxford and Cambridge universities must wear with their full academic dress.
Sub-fusc involves a dark suit, white shirt, collar, and bow tie for men, and a dark suit, white blouse and black ribbon for women. In addition, doctors in the higher faculties and senior university officials wear bands, such as those worn with legal court dress. This clothing is worn under the academic gowns.
Members of Her Majesty's Forces may wear their service uniform with gown and hood in place of sub-fusc. Thus it is not too unusual to see people wearing swords to sit university examinations. Persons in Holy Orders may wear their clerical dress.