IC, Ic, ic, or i.c. may stand for:
Science and technology Astronomy Index Catalogue, a nebula and other object catalogue used in astronomy Type Ic supernova, a subtype of Type I supernova
Biology and medicine Inferior colliculus, a part of the midbrain Informed consent, in clinical trials, a form that has to be signed by the patient before entering a study Intensive care medicine Intermittent catheterisation, a method of relieving the bladder Interstitial cystitis, a disease Inhibitory Concentration, as in half maximal inhibitory concentration (IC50) Inspiratory capacity, a measure of lung volumes Irreducible complexity, a creationist argument
Computing Index of coincidence, in cryptography Integrated circuit, a set of electronic circuits on a semiconductor chip Interactive C, a programming language for robotic controllers Interconnection, physical linking of a telecommunication carrier's network
Economics Indifference curve, in economics Information coefficient, in economics
Physics and chemistry -ic, a suffix describing oxidation state in the IUPAC nomenclature of inorganic chemistry IC, or collector current, in bipolar junction transistors Ice Ic, a metastable cubic crystalline variant of ice Ion chromatography Ionization chamber, a type of radiation detector
Vehicles IC Bus, a bus manufacturer Impuls IC, a German hang glider design International Canoe, a powerful and fast single-handed sailing canoe Interchange (road), is abbreviated as IC in Japan and Korea
Other technologies , a unit of length in the CSS standard equal to the advance measure of the ideograph Interchangeable core, a type of lock cylinder Isolation condenser, a passive cooling system for boiling water nuclear reactors
Language -ić or -ič, a family name suffix in South Slavic languages i.c., an abbreviation for the Latin phrase , meaning 'in this case' , an Old English pronoun A Christogram, a series of letters that form the abbreviated name of Jesus Christ An independent clause in the study of grammar
Organizations Schools Illinois College, Jacksonville, Illinois, US Imperial College London, UK International College, Beirut, Lebanon Ithaca College, Ithaca, New York, US
Other organizations Industry Canada, a division of the Canadian government Ingobamakhosi Carbineers, an infantry regiment of the South African Army United States Intelligence Community, a group of government agencies InterContinental, a hotel chain, or its parent company InterContinental Hotels Group Iron Cross (Burmese band) IC, postnominal letters for a member of the Rosminians, officially the Institute of Charity
Transportation Illinois Central Railroad (reporting mark IC) Indian Airlines (IATA airline designator IC) Intercités, classic long-distance passenger day and night train services in France operated by SNCF InterCity, certain long-distance passenger train services in Europe
Other uses Canary Islands (ISO 3166-1 code: IC) I C, a 2022 short film by Danish filmmaker Helene Moltke-Leth IC codes, police shorthand expressions for apparent ethnicity Identity card Incident commander, person responsible for all aspects of an emergency response Independent contractor Infinite Craft, a video game by Neal Agarwal Internal control, in accounting Intimacy coordinator, staff member on theater, film and television productions Irish Cup, football cup competition in Northern Ireland