19-letter words containing t, h, r, a
- midnight regulation — a rule or directive approved by the federal government near the end of a president’s term of office
- military pentathlon — an athletic contest comprising five different events, a 300-meter freestyle swim, a 4000-meter cross-country run, a 5000-meter equestrian steeplechase, épée fencing, and pistol target-shooting at 25 meters, the winner being the contestant with the highest total score.
- miniature schnauzer — one of a German breed of sturdily built terriers resembling a smaller version of the standard schnauzer, having a wiry, pepper-and-salt, black, or black-and-silver coat, a rectangular head, bushy whiskers, and a docked tail, and originally developed as a farm dog but now raised primarily as a pet.
- mischaracterization — The act of characterizing something in an inaccurate or misleading way.
- molar heat capacity — the heat capacity of one mole of a substance.
- more often than not — usually
- moses-in-the-cradle — a plant, Rhoeo spathacea, native to the West Indies and Central America, having leaves with purple undersides and white flowers enclosed in a boat-shaped envelope formed by two bracts.
- mother-in-law plant — a West Indian foliage plant, Dieffenbachia seguine, of the arum family, having yellow-blotched leaves that cause temporary speechlessness when chewed.
- mother-of-thousands — strawberry geranium.
- motivation research — the application of the knowledge and techniques of the social sciences, especially psychology and sociology, to understanding consumer attitudes and behavior: used as a guide in advertising and marketing.
- multinomial theorem — an expression of a power of a sum in terms of powers of the addends, a generalization of the binomial theorem.
- multiplexor channel — (MPX) mainframe terminology for a slow peripheral device connection, e.g. for a printer, operator console, or card reader.
- mushroom ventilator — a ventilator having at the top of a vertical shaft a broad rounded cap that can be screwed down to close it.
- napierian logarithm — natural logarithm.
- nathaniel hawthorne — Nathaniel, 1804–64, U.S. novelist and short-story writer.
- national characters — (character) Characters with accents and other diacritical marks that are used in certain written languages (that are based on the Roman alphabet) but not in others, particularly not in English. A standard list is ISO Latin 1.
- natural catastrophe — A natural catastrophe is an unexpected event, caused by nature, such as an earthquake or flood, in which there is a lot of suffering, damage, or death.
- near to one's heart — cherished or important
- neighbourhood watch — a scheme under which members of a community agree together to take responsibility for keeping an eye on each other's property, as a way of preventing crime
- nernst heat theorem — the principle that reactions in crystalline solids involve changes in entropy that tend to zero as the temperature approaches absolute zero
- nerve growth factor — a protein that promotes the growth, organization, and maintenance of sympathetic and some sensory nerve cells. Abbreviation: NGF.
- neuropathologically — In a neuropathologic way.
- niagara-on-the-lake — a town in SE Ontario, in S Canada, on Lake Ontario, at the mouth of the Niagara River, on the border between Canada and New York.
- no strings attached — without conditions
- nonplayer character — a character in a tabletop role-playing game who is controlled by the Game Master.
- nordrhein-westfalen — German name of North Rhine-Westphalia.
- north new hyde park — a town on W Long Island, in SE New York.
- north pacific ocean — the northern part of the Pacific Ocean, extending from the equator to the Arctic Ocean.
- north valley stream — a town on W Long Island, in SE New York.
- north-central state — a state of N Nigeria. Capital: Kaduna. Pop: 4 438 007 (1995 est). Area: 46 053 sq km (17 781 sq miles)
- north-northeasterly — a wind or storm coming from the north-northeast
- northwest ordinance — the act of Congress in 1787 providing for the government of the Northwest Territory and setting forth the steps by which its subdivisions might become states.
- not worth a cracker — worthless; useless
- not worth a crumpet — utterly worthless
- noughts and crosses — tick-tack-toe (def 1).
- noughts-and-crosses — tick-tack-toe (def 1).
- occupational hazard — a danger or hazard to workers that is inherent in a particular occupation: Silicosis is an occupational hazard of miners.
- okeechobee waterway — a waterway in S Florida from the Atlantic Ocean to the Gulf of Mexico. 155 miles (244 km) long.
- old english pattern — a spoon pattern having a stem curving backward at the end.
- olive-backed thrush — Swainson's thrush.
- on the baker's list — in good health
- on the razor's edge — a sharp-edged instrument used especially for shaving the face or trimming the hair.
- on-the-job training — apprenticeship, learning by doing
- one after the other — one at a time
- one way and another — on balance
- open-hearth furnace — a process of steelmaking in which the charge is laid in a furnace (open-hearth furnace) on a shallow hearth and heated directly by burning gas as well as radiatively by the furnace walls.
- open-hearth process — a process of steelmaking in which the charge is laid in a furnace (open-hearth furnace) on a shallow hearth and heated directly by burning gas as well as radiatively by the furnace walls.
- operations research — the analysis, usually involving mathematical treatment, of a process, problem, or operation to determine its purpose and effectiveness and to gain maximum efficiency.
- order of the garter — the highest order of British knighthood, instituted by Edward III about 1348.
- oriental fruit moth — a moth, Grapholitha molesta, introduced into the U.S. from Asia, the larvae of which infest and feed on the twigs and fruits of peach, plum, and related trees.