17-letter words containing a, r, e, n
- hoare powerdomain — powerdomain
- hold one's breath — If you say that someone is holding their breath, you mean that they are waiting anxiously or excitedly for something to happen.
- holding operation — a plan or procedure devised to prolong the existing situation
- hole in the heart — a defect of the heart in which there is an abnormal opening in any of the walls dividing the four heart chambers
- hollerith, herman — Herman Hollerith
- holy roman empire — a Germanic empire located chiefly in central Europe that began with the coronation of Charlemagne as Roman emperor in a.d. 800 (or, according to some historians, with the coronation of Otto the Great, king of Germany, in a.d. 962) and ended with the renunciation of the Roman imperial title by Francis II in 1806, and was regarded theoretically as the continuation of the Western Empire and as the temporal form of a universal dominion whose spiritual head was the pope.
- homeland security — national defence
- honorable mention — a citation conferred on a contestant, exhibit, etc., having exceptional merit though not winning a top honor or prize.
- horatio kitchener — Horatio Herbert (1st Earl Kitchener of Khartoum and of Broome) 1850–1916, English field marshal and statesman.
- hormone treatment — any of several medical treatments using hormones
- hospital gangrene — Pathology. a contagious, often fatal gangrene, especially involving amputation stumps and war wounds, occurring usually in crowded, ill-kept hospitals, and caused by putrefactive bacteria.
- hottentot's bread — elephant's-foot.
- housekeeping cart — A housekeeping cart is a large metal basket on wheels which is used by a cleaner in a hotel to move clean bed linen, towels, and cleaning equipment.
- human engineering — an applied science that coordinates the design of devices, systems, and physical working conditions with the capacities and requirements of the worker.
- hurricane warning — a storm warning given for winds with speeds exceeding 63 knots (72 mph, 32 m/sec) when the source of the winds is a tropical cyclone.
- hyaline cartilage — the typical, translucent form of cartilage, containing little fibrous tissue.
- hydrothermal vent — an opening on the floor of the sea from which hot, mineral-rich solutions issue. Compare vent1 (def 2).
- hydroxytryptamine — (organic compound) Any hydroxy derivative of tryptamine, but especially 5-hydroxytryptamine (serotonin).
- hyperalimentation — overfeeding.
- hyperbolic secant — a hyperbolic function that is the reciprocal of cosh; sech
- hyperchlorination — Chemistry. to combine or treat with chlorine. to introduce chlorine atoms into an organic compound by an addition or substitution reaction.
- hyperinflationary — (economics) Having very high levels of inflation.
- hyperintellectual — appealing to or engaging the intellect: intellectual pursuits.
- hyperpigmentation — coloration, especially of the skin.
- hyperpolarisation — Alternative spelling of hyperpolarization.
- hyperpolarization — The act or process of hyperpolarizing.
- hypoglossal nerve — either one of the twelfth pair of cranial nerves, consisting of motor fibers that innervate the muscles of the tongue.
- hypophrygian mode — a plagal church mode represented on the white keys of a keyboard instrument by an ascending scale from B to B, with the final on E.
- i beg your pardon — You say 'Pardon?' or 'I beg your pardon?' or, in American English, 'Pardon me?' when you want someone to repeat what they have just said because you have not heard or understood it.
- iambic pentameter — a verse line consisting of five metrical iambs
- iberian peninsula — Also called Iberian Peninsula. a peninsula in SW Europe, comprising Spain and Portugal.
- icosidodecahedron — A semiregular polyhedron with twelve faces that are regular pentagons and twenty that are equilateral triangles.
- icositetrahedrons — Plural form of icositetrahedron.
- ignoratio elenchi — the fallacy of offering proof irrelevant to the proposition in question.
- illegal immigrant — a person who has entered a country illegally
- illinois waterway — a waterway system in N Illinois made up of canals and rivers connecting Lake Michigan in Chicago with the Mississippi River. 336 miles (541 km) long.
- image intensifier — any of various devices for amplifying the intensity of an optical image, sometimes used in conjunction with an image converter
- image recognition — (graphics, artificial intelligence) The identification of objects in an image. This process would probably start with image processing techniques such as noise removal, followed by (low-level) feature extraction to locate lines, regions and possibly areas with certain textures. The clever bit is to interpret collections of these shapes as single objects, e.g. cars on a road, boxes on a conveyor belt or cancerous cells on a microscope slide. One reason this is an AI problem is that an object can appear very different when viewed from different angles or under different lighting. Another problem is deciding what features belong to what object and which are background or shadows etc. The human visual system performs these tasks mostly unconsciously but a computer requires skillful programming and lots of processing power to approach human performance.
- immediate version — child version
- immigrant workers — people who work in a country they arrived to in order to settle there
- immunosuppressant — (pharmacology) Capable of immunosuppression, immunosuppressive.
- immunotherapeutic — (immunology, medicine) Of a pharmaceutical, acting on the immune system to treat disease; used in immunotherapy.
- impersonalization — to make impersonal: The dial system impersonalized the telephone.
- impersonification — (archaic) the act of impersonating; impersonation.
- implosion therapy — a form of behavior therapy involving intensive recollection and review of anxiety-producing situations or events in a patient's life in an attempt to develop more appropriate responses to similar situations in the future.
- impracticableness — The state of being impracticable; impracticability.
- impressionability — easily impressed or influenced; susceptible: an impressionable youngster.
- improper fraction — a fraction having the numerator greater than the denominator.
- improper integral — Also called infinite integral. a definite integral in which one or both of the limits of integration is infinite.
- improvement grant — a sum of money provided by a government, local authority, or public fund to finance the amelioration of a building, area of land, etc