vicereine

1. The wife of a viceroy.
2. A woman who is the governor of a country, province, or colony, ruling as the representative of a sovereign.

[French : vice-, vice (from Old French; see vice³) + reine, queen (from Latin rēgīna , feminine of rēx, rēg-, king).]

The noun has 2 meanings:

Meaning #1: wife of a viceroy

Meaning #2: governor of a country or province who rules as the representative of his or her king or sovereign
  Synonym: viceroy