拉丁語 – 火星；微粒；微小的部份(例如有關疑問、真理或證據)。 n.

• Unincorporated association
• Uninsured driver
• Union
• Union of concubinage
• Unissued share capital
• Unitary government
• United Kingdom
• United Nations
• United Nations Charter 1945
• United Nations Commission on Human Rights
• United Nations Commission on International Trade Law
• United Nations Development Programme
• United Nations High Commission for Refugees
• United Nations Security Council
• Unit of measurement
• Unit trust
• Unity of interest
• Unity of possession
• Unity of time
• Unity of title
• Universal Copyright Convention
• Universality principle
• Universal jurisdiction
• Universal offer
• University