19-letter words containing a, o, r, i
- melodic minor scale — minor scale (def 2).
- memory like a sieve — a very poor memory
- mercator projection — a conformal projection on which any rhumb line is represented as a straight line, used chiefly in navigation, though the scale varies with latitude and areal size and the shapes of large areas are greatly distorted.
- mercurial barometer — mercury barometer.
- metaphosphoric acid — an acid, HPO 3 , derived from phosphorous pentoxide, and containing the smallest amount of water of the phosphoric acids.
- metropolitan county — (in England) any of the six conurbations established as administrative units in the new local government system in 1974; the metropolitan county councils were abolished in 1986
- metropolitanization — to make metropolitan.
- microelectronically — by microcircuits
- midafternoon prayer — the fifth of the seven canonical hours; none
- midnight regulation — a rule or directive approved by the federal government near the end of a president’s term of office
- military government — a government in defeated territory administered by the military commander of a conquering nation.
- 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.
- mine of information — source of great knowledge
- minimum iron fabric — cloth used to make clothes that require little ironing
- miracle of st. mark — a painting (1548) by Tintoretto.
- mischaracterization — The act of characterizing something in an inaccurate or misleading way.
- missionary position — a position for sexual intercourse in which the couple lies face to face with the male on top.
- missouri meerschaum — corncob (def 2).
- mohammed zahir shah — 1914–2007, king of Afghanistan 1933–73.
- molar heat capacity — the heat capacity of one mole of a substance.
- molecular biologist — a specialist in the study of biological phenomena at the molecular level
- mordvinian republic — a constituent republic of W central Russia, in the middle Volga basin. Capital: Saransk. Pop: 888 700 (2002). Area: 26 200 sq km (10 110 sq miles)
- 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.
- most favored nation — a nation to which privileges of trade are extended under a government policy of giving the same privileges to all nations that are given to any one of them, sometimes depending on whether certain conditions, as of reciprocity, are met
- most-favored-nation — of or relating to the status, treatment, terms, etc., that are embodied in or conferred by a most-favored-nation clause.
- 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.
- 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.
- mount desert island — an island off the coast of E central Maine: summer resort; forms part of Acadia National Park. 14 miles (23 km) long; 8 miles (13 km) wide.
- mouse-ear chickweed — any of various similar and related plants of the genus Cerastium
- mucopolysaccharides — Plural form of mucopolysaccharide.
- 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.
- music to one's ears — something that is very pleasant to hear
- mutual masturbation — the act of two or more people masturbating each other
- nail polish remover — solvent for removing nail polish
- napierian logarithm — natural logarithm.
- narcotics anonymous — an organization that helps drug users recover from drug addiction
- nasty piece of work — malicious person
- nathaniel hawthorne — Nathaniel, 1804–64, U.S. novelist and short-story writer.
- national book award — any of several awards given annually, 1949–79, to an author whose book was judged the best in its category: administered by the Association of American Publishers. Abbreviation: NBA, N.B.A.
- 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.
- national coal board — a statutory corporation set up to run Britain's nationalised coal mining industry between 1947 and 1994, at which time the industry was privatized
- national curriculum — The National Curriculum is the course of study that most school pupils in England and Wales are meant to follow between the ages of 5 and 16.
- national government — A national government is a government with members from more than one political party, especially one that is formed during a crisis.
- national serviceman — a soldier undertaking compulsory military service
- necessary condition — prerequisite
- negation by failure — An extralogical feature of Prolog and other logic programming languages in which failure of unification is treated as establishing the negation of a relation. For example, if Ronald Reagan is not in our database and we asked if he was an American, Prolog would answer "no".
- 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
- network termination — (NT, NT1) A device connecting the customer's data or telephone equipment to the local ISDN exchange carrier's line. The NT device provides a connection for terminal equipment (TE) and terminal adaptor (TA) equipment to the local loop.