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Inferior epigastric artery
Inferior epigastric artery (deep inferior epigastric artery, DIEA): artery of the anterior abdominal wall arising from the external iliac artery above the inguinal ligament, anastomosing with the superior epigastric artery, forming Hesselbach's triangle's lateral border, and at risk in trocar placement.
Inferior frontal gyrus
The inferior frontal gyrus (IFG) is the lowest lateral frontal-lobe gyrus, divided into pars opercularis, triangularis, and orbitalis; its posterior left hemisphere portion is Broca's area, key to speech production, syntax, and response inhibition.
Inferior good
An inferior good is a good whose demand falls as consumer income rises, a label about affordability rather than product quality; examples include public transit and instant noodles.
Inferior mesenteric artery
Inferior mesenteric artery (IMA), unpaired abdominal aorta branch supplying the hindgut. Arises near L3, branches into left colic, sigmoid, and superior rectal arteries; key in colorectal surgery and mesenteric collateral circulation.
Inferior mesenteric vein
The inferior mesenteric vein, or vena mesenterica inferior, is the vein draining the left colon and upper rectum into the portal system, most often through the splenic vein.
Inferior petrosal sinus sampling
Inferior petrosal sinus sampling (IPSS) is an endocrinology procedure that distinguishes pituitary from ectopic ACTH secretion in Cushing syndrome, the gold standard when pituitary MRI is equivocal.
Inferior phrenic arteries
Inferior phrenic arteries (arteriae phrenicae inferiores): paired arteries supplying the diaphragm's inferior surface and adrenal glands, with highly variable origins from the aorta or celiac trunk; key extrahepatic collateral in hepatocellular carcinoma.
Inferior turbinate reduction
Inferior turbinate reduction is a group of surgical procedures that shrink enlarged inferior nasal turbinates to relieve nasal obstruction, ranging from office radiofrequency ablation under local anesthesia to microdebrider turbinoplasty.
Inferior vena cava
Inferior vena cava (IVC), vena cava inferior: the largest vein below the diaphragm, formed by the common iliac veins, carrying lower-body blood to the heart; site of IVC filters (PREPIC, PREPIC2) and ultrasound fluid assessment.
Inferior vena cava filter
Inferior vena cava filter, a metal device placed in the IVC to trap clots and prevent pulmonary embolism when anticoagulation fails or is contraindicated; reduces PE but raises DVT risk without mortality benefit.
Inferior vena cava interruption without azygos continuation
Inferior vena cava interruption without azygos continuation (ORPHA:99123, IVC interruption) is a rare congenital anomaly with complete IVC interruption and no azygos/hemiazygos continuity; lower-body return uses collaterals, causing DVT, edema, and loss of femoral venous access.
Inferiority complex
Inferiority complex: pervasive feeling of inadequacy from actual or imagined deficiency, introduced by Alfred Adler (organ inferiority, 1907). Not a DSM-5/ICD-11 diagnosis; measured by COMPIN; linked to depression, anxiety, suicidality; counterpart of the superiority complex.
Infernal Affairs (无间道)
Infernal Affairs (無間道, Mou gaan dou) is a 2002 Hong Kong crime thriller by Andrew Lau and Alan Mak about dueling moles in police and triads; it won HK Film and Golden Horse Best Film and was remade as The Departed.
Infernal Affairs II (无间道II)
Infernal Affairs II (無間道II) is the 2003 Hong Kong prequel to Infernal Affairs, directed by Andrew Lau and Alan Mak, set 1991–1997 around the handover, starring Edison Chen, Shawn Yue, Eric Tsang, and Anthony Wong.
Infernal Affairs III (无间道III 终极无间)
Infernal Affairs III (無間道III：終極無間) is the 2003 final film of Andrew Lau and Alan Mak's Hong Kong mole thriller trilogy, starring Andy Lau, Tony Leung, and Leon Lai, mixing sequel and prequel timelines; critics rated it below the first film.
Inferno (1980 film)
Inferno (1980) is Dario Argento's Italian supernatural horror film, second in the Three Mothers trilogy after Suspiria, following a student who uncovers the witch Mater Tenebrarum in a cursed New York apartment building, scored by Keith Emerson.
Inferno (2016 film)
Inferno is a 2016 American action thriller directed by Ron Howard and starring Tom Hanks as Robert Langdon, adapting Dan Brown's 2013 novel of the same name.
Inferno (Boards of Canada album)
Inferno (2026) is the fifth studio album by Scottish electronic duo Boards of Canada, released via Warp Records (WARP496), their first album in 13 years after Tomorrow's Harvest, an 18-track, 70-minute record of occult, religious themes.
Inferno (Brown novel)
Inferno (2013) is Dan Brown's fourth Robert Langdon thriller, set in Florence, Venice, and Istanbul, in which Langdon decodes Dante-based clues to stop a virus tied to an overpopulation plot; it sold over one million copies in its first North American week.
Inferno (Dante)
Inferno, first canticle of Dante Alighieri's Divine Comedy, is a 34-canto terza rima descent through nine circles of Hell guided by Virgil, written about 1307 to 1321 in exile, first fully translated into English by Rogers in 1782 and endlessly adapted in art and film.
Inferno (Doctor Who)
Inferno (Doctor Who): seven-part 1970 BBC1 serial, Season 7 finale, written by Don Houghton, starring Jon Pertwee; the Third Doctor visits a fascist parallel Earth destroyed by the Inferno drilling project.
Inferno Cop (インフェルノコップ)
Inferno Cop (インフェルノコップ) is a 2012-2013 ONA, Trigger's first complete series, directed by Akira Amemiya and supervised by Hiroyuki Imaishi: 13 three-minute episodes about a flaming undead vigilante cop versus the Southern Cross syndicate.
Inferno Verde
Inferno Verde (Green Hell) is a 1908 short story collection by Brazilian writer and engineer Alberto Rangel, his debut, portraying the Amazon during the rubber boom.
Infernodrakon
Infernodrakon hastacollis, the 'hell dragon', is an azhdarchid pterosaur from the Hell Creek Formation, Montana, named in 2025 from a single 350 mm neck vertebra found in 2002 beside the juvenile T. rex 'Jane'; wingspan about 4 m.
Infertility
Infertility: failure to achieve pregnancy after 12 months of regular unprotected intercourse, a reproductive-system disease affecting about 1 in 6 people worldwide; causes span male, female, and unexplained factors, treated with ovulation induction, surgery, IUI, and IVF.
Infertility in domestic animals
Infertility in domestic animals is the failure of livestock or pets to conceive, caused by disease in cattle and mostly by breeding-management errors in dogs and cats.
Infest the Rats' Nest
Infest the Rats' Nest: fifteenth studio album by King Gizzard & the Lizard Wizard, a thrash metal concept record on ecological disaster and flight to Venus, released 16 August 2019 via Flightless/ATO.
Infested
Infested (Vermines) is a 2023 French spider-invasion horror film, the debut of director Sébastien Vaniček, starring Théo Christine; 95% on Rotten Tomatoes, César-nominated, streamed on Shudder as Infested.
Infestissumam
Infestissumam, Latin for "most hostile" (Antichrist reference), is Ghost's second studio album, released April 10, 2013 on Loma Vista; recorded in Nashville with producer Nick Raskulinecz, Papa Emeritus II era, 10 songs in 47 minutes.
Infibulation
Infibulation, WHO FGM Type III, is narrowing of the vaginal opening by cutting and repositioning the labia to form a seal; concentrated in Sudan and Somalia, treated by deinfibulation, with reinfibulation discouraged.