18-letter words containing a, t, h, e, n, i
- inner automorphism — an automorphism that maps an element x into an element of the form axa −1 where a −1 is the inverse of a.
- inter-relationship — reciprocal relation.
- interchangeability — (of two things) capable of being put or used in the place of each other: interchangeable symbols.
- interrelationships — Plural form of interrelationship.
- ionization chamber — a device for detecting and measuring ionizing radiation, consisting of a tube containing a low pressure gas and two electrodes between which a high voltage is maintained. The current between the electrodes is a function of the intensity of the radiation
- iron (ii) sulphate — an iron salt with a saline taste, usually obtained as greenish crystals of the heptahydrate, which are converted to the white monohydrate above 100°C: used in inks, tanning, water purification, and in the treatment of anaemia. Formula: FeSO4
- jack-in-the-pulpit — A North American plant, Arisaema triphyllum, of the arum family, having an upright spadix arched over by a green or striped purplish-brown spathe.
- japanese artichoke — Chinese artichoke.
- junior heavyweight — a boxer weighing up to 190 pounds (85.5 kg), between light heavyweight and heavyweight.
- king of the castle — most powerful figure
- king-of-the-salmon — a ribbonfish, Trachypterus altivelis, of northern parts of the Pacific Ocean.
- kitchen-sink drama — a type of drama of the 1950s depicting the sordid aspects of domestic reality
- knight of the bath — a member of a knightly order founded by George I of England in 1725.
- knight of the road — a tramp
- lactogenic hormone — prolactin.
- lake pontchartrain — a shallow lagoon in SE Louisiana, linked with the Gulf of Mexico by a narrow channel, the Rigolets: resort and fishing centre. Area: 1620 sq km (625 sq miles)
- lay it on the line — a mark or stroke long in proportion to its breadth, made with a pen, pencil, tool, etc., on a surface: a line down the middle of the page.
- leave in the lurch — a situation at the close of various games in which the loser scores nothing or is far behind the opponent.
- legislative branch — the branch of government having the power to make laws; the legislature.
- light displacement — the weight of a ship with all its permanent equipment, excluding the weight of cargo, persons, ballast, dunnage, and fuel, but usually including the weight of permanent ballast and water used to operate steam machinery.
- lighting cameraman — the person who designs and supervises the lighting of scenes to be filmed
- lightning arrester — a device for preventing damage to radio, telephonic, or other electric equipment from lightning or other high-voltage currents, using spark gaps to carry the current to the ground without passing through the device.
- literae humaniores — (at Oxford University) the faculty concerned with Greek and Latin literature, ancient history, and philosophy; classics
- magnetorheological — (physics) describing a substance whose rheological properties are modified by a magnetic field.
- make a night of it — to cause an activity to last a night
- malpighian tubules — one of a group of long, slender excretory tubules at the anterior end of the hindgut in insects and other terrestrial arthropods.
- manchester terrier — one of a breed of slender terriers having a short, glossy, black-and-tan coat, raised originally in Manchester, England.
- marketing research — the study of influences upon customer and consumer behaviour and the analysis of market characteristics and trends
- materials handling — the loading, unloading, and movement of goods, as within a factory or warehouse, especially by the aid of mechanical devices.
- maternity hospital — birthing facility
- matthias schleiden — Matthias Jakob [mah-tee-ahs yah-kawp] /mɑˈti ɑs ˈyɑ kɔp/ (Show IPA), 1804–81, German botanist.
- mechanical testing — Mechanical testing is the testing of a material to find out its mechanical properties, for example its yield strength or hardness.
- median lethal dose — the quantity of a lethal substance, as a poison or pathogen, or of ionizing radiation that will kill 50 percent of the organisms subjected to it in a specified time period. Symbol: LD 5 0.
- medical technician — a person, not a qualified doctor, who does practical work in a hospital
- menthol cigarettes — cigarettes that are flavoured with menthol
- merchant of venice — a comedy (1596?) by Shakespeare.
- metacentric height — the distance between the center of gravity and the metacenter of a floating body, as of a vessel.
- methacrylate resin — an acrylic resin formed by polymerizing the esters or amides of methacrylic acid.
- microsoft exchange — (messaging) Microsoft's messaging and enterprise collaboration server. Exchange's primary role is as an electronic mail message store but it can also store calendars, task lists, contact details, and other data.
- miniature pinscher — one of a German breed of toy dogs resembling a smaller version of the Doberman pinscher, having a flat skull, a smooth coat, erect ears, and a docked tail, bred originally as a watchdog.
- minister of health — a person appointed to head the government department of health
- moccasin telegraph — the transmission of rumour or secret information; the grapevine
- morphine addiction — the fact or condition of being addicted to morphine
- mount saint helens — a city in Merseyside, in NW England, near Liverpool.
- multimedia machine — machines that allow users to control and manipulate sound, video, text and graphics
- nailed to the wall — [like a trophy] Said of a bug finally eliminated after protracted, and even heroic, effort.
- naval architecture — the science of designing ships and other waterborne craft.
- nebular hypothesis — the theory that the solar system evolved from a mass of nebular matter: prominent in the 19th century following its precise formulation by Laplace.
- negative cash flow — the situation when income is less than payments
- neighborhood watch — a neighborhood surveillance program or group in which residents keep watch over one another's houses, patrol the streets, etc., in an attempt to prevent crime.