1. (of unknown regions) not yet surveyed or investigated
   - chartless, uncharted

See also: unknown

• Isidore Auguste Marie François Comte
• isinglass
• Isis
• ISKCON
• Islam
• Islam Nation
• Islamabad
• Islamic
• Islamic Army of Aden
• Islamic Army of Aden-Abyan
• Islamic calendar
• Islamic calendar month
• Islamic Community
• Islamic Great Eastern Raiders-Front
• Islamic Group
• Islamic Group of Uzbekistan
• Islamic Jihad
• Islamic Jihad for the Liberation of Palestine
• Islamic law
• Islamic Party of Turkestan
• Islamic Republic of Iran
• Islamic Republic of Mauritania
• Islamic Republic of Pakistan
• Islamic Resistance Movement
• Islamic State of Afghanistan