| ibernare | hibernate |
| ibernazione | Hibernation |
| Ibestad | Ibestad |
| Ibicella lutea | Ibicella lutea |
| Ibico | Ibycus |
| ibis | ibis |
| ibisco | hibiscus |
| Ibiza | Ibiza |
| IBKA | International League of non-religious and atheists |
| Iblis | Iblis |
| IBM | IBM |
| IBM Broadway | Broadway |
| IBM Deep Blue | IBM Deep Blue |
| IBM MareNostrum | MareNostrum |
| IBM NORC | IBM NORC |
| IBM Personal Computer XT | IBM Personal Computer XT |
| IBM Roadrunner | IBM Roadrunner |
| IBM System p | IBM System p |
| Ibn al-Athir | Ali ibn al-Athir |
| Ibn Arabi | Ibn Arabi |
| Ibn Battuta | Ibn Battuta |
| Ibn Hawqal | Ibn Hawqal |
| Ibn Khaldun | Ibn Khaldun |
| Ibn Taymiyya | Ibn Taymiyyah |
| Ibrahim Egal | Muhammad Haji Ibrahim Egal |
| Ibrahim I | Ibrahim I |
| Ibrahim ibn al-Aghlab | Ibrahim I ibn al-Aghlab |
| Ibrahim Kaypakkaya | İbrahim Kaypakkaya |
| İbrahim Kutluay | İbrahim Kutluay |
| Ibrahim Rugova | Ibrahim Rugova |
| Ibrahim Shaban Likmetaj Kodra | Ibrahim Kodra |
| Ibrahima Sory Camara | Ibrahima Camara |
| Ibri | Ibri |
| ibridizzazione | hybridisation |
| ibrido | crossbred |
| Ibuprofene | Ibuprofen |
| Iburi | Iburi Province |
| Ica | Ica Region |
| ICANN | ICANN |
| Icaria | Icaria |
| Icaro | Icarus |
| ICBJA | ICBJA |
| ICCF | International Correspondence Chess Federation |
| ICE | In case of emergency |
| Ice Princess | Ice Princess |
| Ice T | Ice T |
| iceberg | iceberg |
| Icecast | Icecast |
| IceCube | IceCube Neutrino Detector |
| Iced Earth | Iced Earth |
| Icelandair | Icelandair |
| Iceni | Iceni |
| Icerya purchasi | Icerya purchasi |
| Iceta di Siracusa | Hicetas |
| IceWeasel | Mozilla Corporation software rebranded in Debian |
| ICH | Ich |
| Ich bin Berliner | Ich bin ein Berliner |
| Ich bin ein Berliner | Ich bin ein Berliner |
| IChat | IChat |
| Ichenhausen | Ichenhausen |
| Ichi the Killer | Ichi the Killer |
| Ichigo Kurosaki | Ichigo Kurosaki |
| Ichigo Mashimaro | Strawberry Marshmallow |
| Ichiro Hatoyama | Ichirō Hatoyama |
| Ichirō Mizuki | Ichiro Mizuki |
| Ichneumia albicauda | White-tailed Mongoose |
| Ichneumonidae | Ichneumonidae |
| Ichneumonoidea | Ichneumon wasp |
| Ichtershausen | Ichtershausen |
| Ichthyophis glutinosus | Ichthyophis glutinosus |
| Ichthyophthirius multifiliis | Ichthyophthirius multifiliis |
| Ichthyornis | Ichthyornis |
| Ichthyornis dispar | Ichthyornis |
| Ichthyostega | Ichthyostega |
| Ichthys | Ichthys |
| Icking | Icking |
| Ico | ICO |
| Icogne | Icogne |
| icona | icon |
| icone | icon |
| Iconio | Konya |
| iconoclasta | iconoclast |
| Iconoclastia | Iconoclasm |
| iconoclastico | iconoclastic |
| Iconografia di Gesù | Depiction of Jesus |
| Icosidodecaedro | Icosidodecahedron |
| Icosidodecaedro troncato | Truncated icosidodecahedron |
| Icositetraedro pentagonale | Pentagonal icositetrahedron |
| ICP-MS | Inductively coupled plasma mass spectrometry |
| ICS Vortex | ICS Vortex |
| ICSI | Intracytoplasmic sperm injection |
| ICT | Information technology |
| Ictino | Iktinos |
| Ictonyx striatus | Striped Polecat |
| Ictus | Stroke |
| Ictus cerebrale | Stroke |
| ID | ID |
| Id al-adha | Eid ul-Adha |
| IDA | Ida |
| Ida di Bernicia | Ida of Bernicia |
| Ida Lvovna Rubinstein | Ida Rubinstein |
| Ida-Virumaa | Ida-Viru County |
| Idaho | Idaho |
| Idaho Stampede | Idaho Stampede |
| Idaira Fernández Rodríguez | Idaira |
| Idalgo | Metro Hidalgo |
| Idar-Oberstein | Idar-Oberstein |
| Idas | Idas |
| Idazio | Hydatius |
| IDC | Iris deactivation code |
| Iddio | God |
| Iddìo | God |
| idea | thought |
| ideabile | conceivable |
| ideale | ideal |
