- i ... I Hated, Hated, Hated This Movie
- I Have A Dream ... I’ll Never Fall in Love Again
- I’ll Never Get out of This World Alive ... Iakchos
- Ialá, Koumba ... Iberis amara
- Iberis gibraltarica ... Ibn Kathīr
- Ibn Kemal ... Ibrāhīm, Wadi
- IBRD ... ice pit
- ice plant ... Ichinotani Futaba gunki
- Ichiyūsai Hiroshige ... ICW
- icy conglomerate model ... Idee der Universität, Die
- idée fixe ... Idioterne
- Idiots First ... If He Hollers Let Him Go
- If I Did It ... Igilgili
- Igilium ... Iha, James Yoshinobu
- Ihara Saikaku ... Iki
- ikigami ... Ilex opaca
- Ilex paraguariensis ... Illig, Moritz Friedrich
- Illimani, Nevado ... Ilois
- Ilokan ... Imaging and Navigation Camera
- imaging radar ... Imlach, Punch
- immacolata ... imogolite
- Imola ... imperial moth
- Imperial Oath of Five Articles ... Impresiones y paisajes
- impressing ... In Arcadia
- In artem analyticam isagoge ... In Search of Our Mothers’ Gardens
- In Search of the Castaways ... in-home care
- In-Laws, The ... inch plant
- inch plant ... incompressibility
- Inconfidência Mineria ... Independent Bulgarian Trade Unions, Confederation of
- independent carrier ... Indian albizia
- Indian almond ... Indian mustard
- Indian Mutiny ... Indiana Seminary
- Indiana Soldiers’ and Sailors’ Monument ... indirect action process
- indirect development ... indole-3-acetic acid
- indoleacetic acid ... inductive effect
- inductive inference ... industrial safety
- industrial school ... Infants of the Spring
- infarction ... Influence of Sea Power upon History, 1660–1783, The
- Influence of Sea Power upon the French Revolution and Empire, 1793–1812, The ... infratrack
- infundibulum ... inhaler
- Inhambane ... Inka
- Inka Roqa Inka ... Innis, Harold
- Innisfail ... Inquiry into the Distinctness of the Principles of Natural Theology and Morals
- Inquiry into the Human Prospect, An ... Inspector Maigret
- Inspector Mom ... instrument
- instrument flight rule ... integration host factor
- integration mode ... Inter
- Inter gravissimas ... intereses creados, Los
- Interessengemeinschaft Basel ... interlocking
- interlocking ... internal radiation therapy
- internal realism ... International Church of the Foursquare Gospel
- International Civil Aviation Organization ... International Federation for Information and Documentation
- International Federation of Association Football ... International Nurses Day
- International Office of Public Health ... International Tennis Federation
- International Tennis Hall of Fame ... interplanetary coronal mass ejection
- interplanetary dust particle ... Intervention of the Sabine Women, The
- intervention, currency of ... intransitive verb
- intraocular lens ... intussusception
- Inu tsukuba shū ... inverted dish
- inverted dome ... Ioanesi
- Ioánnina ... Ionic dialect
- ionic dissociation ... Iphigenia in Tauris
- Iphigénie ... Iquitos
- Ir ... Ireland, William-Henry
- Irena ... Irish needle lace
- Irish Parliamentary Party ... iron mask, the man in the
- iron meteorite ... irreversible toxic response
- IRRI ... Isaac Or Zaruʾa
- Isaac Syrus ... ischemia
- ischemic bone necrosis ... ʿIshrun maqalat
- Ishtar ... Islam, Mazharul
- Islam, Nation of ... Island, the
- Islander ... Isobel Gunn
- isobutane ... isonomia
- Isonzo ... Israel Workers List
- Israel’s disengagement from Gaza ... Istoriya odnoy zhizhni
- Istoriya Rossiyskaya s samikh drevneyshikh vremyon ... Itagaki Taisuke, Hakushaku
- Itagüí ... Italica
- Italicus, Silius ... Itsuku Island
- itsutsu-ginu ... Ivano-Frankivsk
- Ivano-Frankovsk ... iwi
- Iwo ... ʿIzz al-Dīn Saʿd
- Izzard, Eddie ... Iʿtimād al-Dawlah, tomb of