17-letter words containing h, e, y, n
- desynchronisation — (British spelling) Alternative form of desynchronization.
- desynchronization — to cause to indicate the same time, as one timepiece with another: Synchronize your watches.
- diethylene glycol — a syrupy colorless liquid, C 4 H 10 O 3 , used as a solvent for cellulose nitrate and as a fabric softener.
- diethyltryptamine — a synthetic derivative of tryptamine with hallucinogenic and psychotogenic effects. Abbreviation: DET.
- dihydroergotamine — an ergot alkaloid, C 33 H 37 N 5 O 5 , used in the treatment of various types of migraine headache.
- dihydromorphinone — a narcotic compound, C 17 H 19 O 3 N, prepared from morphine and used chiefly as an analgesic.
- dimethylhydrazine — a flammable, highly toxic, and colorless liquid, C 2 H 8 N 2 , used as a component in jet and rocket fuels.
- diphenylacetylene — tolan.
- diphenylhydantoin — a white, slightly water-soluble powder, C 15 H 11 N 2 O 2 , used in the form of its sodium salt to prevent or arrest convulsions in epilepsy.
- drive-by shooting — an incident in which a person, building, or vehicle is shot at by someone in a moving vehicle
- eastern orthodoxy — the faith, practice, membership, and government of the Eastern Orthodox Church.
- electrotechnology — the technological use of electric power
- elementary school — primary school
- encephalomyelitic — Relating to encephalomyelitis.
- encephalomyelitis — Inflammation of the brain and spinal cord, typically due to acute viral infection.
- ethinyloestradiol — Alternative form of ethinylestradiol.
- ethnopharmacology — The scientific study correlating ethnic groups, their health, and how it relates to their physical habits and methodology in creating and using medicines.
- ethylmethylketone — (organic compound) The industrial solvent butanone.
- fee-paying school — a school which charges fees to parents of pupils
- firehose syndrome — (networking, jargon) An absence, failure or inadequacy of flow control mechanisms causing the sender to overwhelm the receiver. The implication is that, like trying to drink from a firehose, the consequenses are worse than just loss of data, e.g. the receiver may crash. See ping-flood.
- friend of dorothy — a male homosexual
- geothermal energy — Geothermal energy is energy from temperature differences inside the earth's crust.
- glory-of-the-snow — any of several plants belonging to the genus Chionodoxa, of the lily family, native to the Old World, having showy, blue, white, or pink flowers that bloom early in the spring.
- go to the country — If a head of government or a government goes to the country, they hold a general election.
- haematocrystallin — Alternative form of hematocrystallin.
- haemoglobinopathy — (medicine) Any of a group of inherited disorders in which haemoglobin does not function properly.
- hamiltonian cycle — Hamiltonian problem
- harvey wallbanger — a screwdriver cocktail topped with Galliano.
- have a roving eye — to show a widespread amorous interest in the opposite sex
- heavy mineral oil — a colorless, oily, almost tasteless, water-insoluble liquid, usually of either a standard light density (light mineral oil) or a standard heavy density (heavy mineral oil) consisting of mixtures of hydrocarbons obtained from petroleum by distillation: used chiefly as a lubricant, in the manufacture of cosmetics, and in medicine as a laxative.
- henry cabot lodge — Henry Cabot, 1850–1924, U.S. public servant and author: senator 1893–1924.
- henry of portugal — ("the Navigator") 1394–1460, prince of Portugal: sponsor of geographic explorations.
- heritage industry — an industry that manages the historical sites, buildings, and museums in a particular place, with the aim of encouraging tourism
- heteronormativity — The view that all human beings are either male or female, both in sex and in gender, and that sexual and romantic thoughts and relations are normal only when between people of different sexes.
- high-density disk — a computer storage disk capable of holding more than 720 kilobytes of data
- highways engineer — a civil engineer trained and specialized in the planning, construction, maintenance, etc of highways and roads
- 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
- hurler's syndrome — a medical condition characterized by physical deformity and mental deficiency
- huygens principle — the principle that all points on a wave front of light are sources of secondary waves and that surfaces tangential to these waves define the position of the wave front at any point in time.
- huygens' eyepiece — a telescope eyepiece consisting of two planoconvex lenses separated by a distance equal to half the sum of their focal lengths, which are in the ratio of three to one, and oriented so that their curved surfaces face the incident light
- hyaline cartilage — the typical, translucent form of cartilage, containing little fibrous tissue.
- hydrogen chloride — a colorless gas, HCl, having a pungent odor: the anhydride of hydrochloric acid.
- hydrogen fluoride — a colorless corrosive gas, HF, the anhydride of hydrofluoric acid, used chiefly as a catalyst and in the fluorination of hydrocarbons.
- hydrogen peroxide — a colorless, unstable, oily liquid, H 2 O 2 , an aqueous solution of which is used chiefly as an antiseptic and a bleaching agent.
- hydrogen sulphide — Chemistry
- 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).
- hyper-intelligent — having good understanding or a high mental capacity; quick to comprehend, as persons or animals: an intelligent student.
- hyperalimentation — overfeeding.