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Glossary · Nouns · I

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TermTypeDefinitionClassificationsUpdated
Iron PuttynounMWEa cement resembling puttyverifiedMay 18, 2026
Iron PyritenounMWEa common mineral (iron disulfide) that has a pale yellow colorverifiedMay 18, 2026
Iron TrapnounMWEa trap from which there is no escapeverifiedMay 18, 2026
Iron TreenounMWEa small slow-growing deciduous tree of northern Iran having a low domed shapeverifiedMay 18, 2026
Iron-Storage DiseasenounMWEpathology in which iron accumulates in the tissuesverifiedMay 18, 2026
Ironingnounthe work of using heat to smooth washed clothes in order to remove any wrinklesverifiedMay 18, 2026
Ironing BoardnounMWEnarrow padded board on collapsible supportsverifiedMay 18, 2026
Ironistnouna humorist who uses ridicule and irony and sarcasmverifiedMay 18, 2026
Ironmongernounsomeone who sells hardwareverifiedMay 18, 2026
Ironmonger's ShopnounMWEa store selling hardwareverifiedMay 18, 2026
Ironmongerynounthe merchandise that is sold in an ironmonger's shopverifiedMay 18, 2026
Ironsidenouna man of great strength or braveryverifiedMay 18, 2026
Ironwarenouninstrumentalities (tools or implements) made of metalverifiedMay 18, 2026
Ironweednounany of various plants of the genus Vernonia of tropical and warm regions of especially North America that take their name from their loose heads of purple to rose flowers that quickly take on a rusty hueverifiedMay 18, 2026
Ironwoodnounhandsome East Indian evergreen tree often planted as an ornamental for its fragrant white flowers that yield a perfumeverifiedMay 18, 2026
Ironwood TreenounMWEhandsome East Indian evergreen tree often planted as an ornamental for its fragrant white flowers that yield a perfumeverifiedMay 18, 2026
Ironworknounwork made of iron (gratings or rails or railings etc)verifiedMay 18, 2026
Ironworkernouna person who makes articles of ironverifiedMay 18, 2026
Ironynouna trope that involves incongruity between what is expected and what occursverifiedMay 18, 2026
Irradiationnoun(Pavolvian conditioning) the elicitation of a conditioned response by stimulation similar but not identical to the original stimulusverifiedMay 18, 2026
Irrational HostilitynounMWEextreme prejudiceverifiedMay 18, 2026
Irrational ImpulsenounMWEa strong spontaneous and irrational motivationverifiedMay 18, 2026
Irrational MotivenounMWEa motivation that is inconsistent with reason or logicverifiedMay 18, 2026
Irrational NumbernounMWEa real number that cannot be expressed as a rational numberverifiedMay 18, 2026
Irrationalitynounthe state of being irrationalverifiedMay 18, 2026
Irrealitynounthe state of being insubstantial or imaginaryverifiedMay 18, 2026
Irredentanouna region that is related ethnically or historically to one country but is controlled politically by anotherverifiedMay 18, 2026
Irredentismnounthe doctrine that irredenta should be controlled by the country to which they are ethnically or historically relatedverifiedMay 18, 2026
Irredentistnounan advocate of irredentismverifiedMay 18, 2026
Irregularitynounbehavior that breaches the rule or etiquette or custom or moralityverifiedMay 18, 2026
Irrelevancenounthe lack of a relation of something to the matter at handverifiedMay 18, 2026
Irrelevancynounthe lack of a relation of something to the matter at handverifiedMay 18, 2026
Irreligionnounthe quality of not being devoutverifiedMay 18, 2026
Irreligionistnounsomeone who is indifferent or hostile to religionverifiedMay 18, 2026
Irreligiousnessnounthe quality of not being devoutverifiedMay 18, 2026
Irreplaceablenessnounthe quality of being irreplaceableverifiedMay 18, 2026
Irrepressibilitynounirrepressible liveliness and good spiritverifiedMay 18, 2026
Irreproducibilitynounthe quality of being unreproducibleverifiedMay 18, 2026
Irresistibilitynounthe quality of being overpowering and impossible to resistverifiedMay 18, 2026
Irresistiblenessnounthe quality of being overpowering and impossible to resistverifiedMay 18, 2026
Irresolutenessnounthe trait of being irresoluteverifiedMay 18, 2026
Irresolutionnoundoubt concerning two or more possible alternatives or courses of actionverifiedMay 18, 2026
Irresponsibilitynouna form of untrustworthinessverifiedMay 18, 2026
Irresponsiblenessnouna form of untrustworthinessverifiedMay 18, 2026
Irreverencenounan irreverent mental attitudeverifiedMay 18, 2026
Irreversibilitynounthe quality of being irreversible (once done it cannot be changed)verifiedMay 18, 2026
Irreversible ProcessnounMWEany process that is not reversibleverifiedMay 18, 2026
Irridentanouna region that is related ethnically or historically to one country but is controlled politically by anotherverifiedMay 18, 2026
Irridentismnounthe doctrine that irredenta should be controlled by the country to which they are ethnically or historically relatedverifiedMay 18, 2026
Irridentistnounan advocate of irredentismverifiedMay 18, 2026
Irrigationnoun(medicine) cleaning a wound or body organ by flushing or washing out with water or a medicated solutionverifiedMay 18, 2026
Irrigation DitchnounMWEa ditch to supply dry land with water artificiallyverifiedMay 18, 2026
Irritable Bowel SyndromenounMWErecurrent abdominal pain and diarrhea, often alternating with periods of constipationverifiedMay 18, 2026
Irritantnounsomething that causes irritation and annoyanceverifiedMay 18, 2026
Irritationnounthe neural or electrical arousal of an organ or muscle or glandverifiedMay 18, 2026
Irruptionnouna sudden violent spontaneous occurrence (usually of some undesirable condition)verifiedMay 18, 2026
Irsnounthe bureau of the Treasury Department responsible for tax collectionsverifiedMay 18, 2026
ISAC (Acronym)nounMWEInformation Sharing and Analysis Center.OrganizationMay 9, 2026
Isarithmnouna line drawn on a map connecting points having the same numerical value of some variableverifiedMay 18, 2026
Ischaemianounlocal anemia in a given body part sometimes resulting from vasoconstriction or thrombosis or embolismverifiedMay 18, 2026
Ischaemic StrokenounMWEthe most common kind of strokeverifiedMay 18, 2026
Ischemianounlocal anemia in a given body part sometimes resulting from vasoconstriction or thrombosis or embolismverifiedMay 18, 2026
Ischemic AnoxianounMWEanoxia resulting from slow peripheral circulation (such as follows congestive cardiac failure)verifiedMay 18, 2026
Ischemic HypoxianounMWEhypoxia resulting from slow peripheral circulation (such as follows congestive cardiac failure)verifiedMay 18, 2026
Ischemic StrokenounMWEthe most common kind of strokeverifiedMay 18, 2026
Ischial BonenounMWEone of the three sections of the hipboneverifiedMay 18, 2026
Ischiumnounone of the three sections of the hipboneverifiedMay 18, 2026
Ishmaelnouna person who is rejected (from society or home)verifiedMay 18, 2026
Isinglassnounany of various minerals consisting of hydrous silicates of aluminum or potassium etc. that crystallize in forms that allow perfect cleavage into very thin leavesverifiedMay 18, 2026
Islamistnounan orthodox MuslimverifiedMay 18, 2026
Islamophobianounprejudice against MuslimsverifiedMay 18, 2026
Islandnouna land mass (smaller than a continent) that is surrounded by waterverifiedMay 18, 2026
Island DispensernounMWEa pump in a service station that draws gasoline from underground storage tanksverifiedMay 18, 2026
Island of GuernseynounMWEa Channel Island to the northwest of JerseyverifiedMay 18, 2026
Island of JerseynounMWEthe largest of the Channel IslandsverifiedMay 18, 2026
Island-Dwellernounan inhabitant of an islandverifiedMay 18, 2026
Islandernounan inhabitant of an islandverifiedMay 18, 2026
Islands of LangerhansnounMWEcell clusters in the pancreas that form the endocrine part of that organverifiedMay 18, 2026
IslaynounCalifornia evergreen wild plum with spiny leathery leaves and white flowersverifiedMay 18, 2026
Islenouna small islandverifiedMay 18, 2026
Isles of LangerhansnounMWEcell clusters in the pancreas that form the endocrine part of that organverifiedMay 18, 2026
Isletnouna small islandverifiedMay 18, 2026
Islets of LangerhansnounMWEcell clusters in the pancreas that form the endocrine part of that organverifiedMay 18, 2026
Ismnouna belief (or system of beliefs) accepted as authoritative by some group or schoolverifiedMay 18, 2026
ISOnounInternational Organization for Standardization, a voluntary, non-treaty, non-government organization, established in 1947, with voting members that are designated standards bodies of participating nations and non-voting observer organizations.OrganizationMay 9, 2026
Isoagglutinationnounagglutination of an agglutinogen of one individual by a serum from another individual of the same speciesverifiedMay 18, 2026
Isoagglutininnounan antibody produced by one individual that causes agglutination of red blood cells in other individuals of the same speciesverifiedMay 18, 2026
Isoagglutinogennounan antigen capable of causing the production of (or reacting with) an isoagglutininverifiedMay 18, 2026
Isoantibodynounan antibody that occurs naturally against foreign tissues from a person of the same speciesverifiedMay 18, 2026
Isobarnoun(meteorology)an isogram connecting points having equal barometric pressure at a given timeverifiedMay 18, 2026
Isobutyl NitritenounMWEa colorless pungent liquid sometimes used as a stimulant drug by drug abusersverifiedMay 18, 2026
Isobutylenenounused also in making gasoline componentsverifiedMay 18, 2026
Isobutylphenyl Propionic AcidnounMWEa nonsteroidal anti-inflammatory and analgesic medicine (trade names Advil and Motrin and Nuprin) used to relieve the pain of arthritis and as an antipyreticverifiedMay 18, 2026
Isochronenounan isogram connecting points at which something occurs or arrives at the same timeverifiedMay 18, 2026
Isoclinic LinenounMWEan isogram connecting points of equal magnetic inclinationverifiedMay 18, 2026
Isocyanatenouna salt or ester of isocyanic acidverifiedMay 18, 2026
Isocyanic AcidnounMWEan acid known only in the form of its estersverifiedMay 18, 2026
Isofluranenouna widely used inhalation anestheticverifiedMay 18, 2026
Isogametenouneither of a pair of conjugating gametes of the same size and structureverifiedMay 18, 2026
Isogamynoun(biology) reproduction by the union or fusion of gametes of the same size and structureverifiedMay 18, 2026