1. Based on the principle of having only one member (as of a legislature) selected from each electoral district
   - uninominal system, uninominal voting system, single-member system, scrutin uninomial system

Type of: electoral system, voting system

• Ofo
• oft
• often
• oftener
• oftenest
• oftenness
• oftentimes
• ofttimes
• Ogalala
• ogam
• Ogcocephalidae
• Ogden
• Ogden Nash
• ogdoad
• ogee
• ogee arch
• ogham
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• Oglala
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• ogress
• ogrish