18-letter words containing a, b, o, r, t, m
- abortion-on-demand — the right of a woman to have an abortion during the first six months of a pregnancy.
- actual bodily harm — Actual bodily harm is a criminal offence in which someone gives another person a minor injury.
- adjournment debate — (in the UK) a short debate, held immediately before the end of each day's business in the House of Commons, in which backbench MPs raise matters relating to their constituencies
- admirable crichton — a comedy (1902) by Sir James M. Barrie.
- adobe type manager — (text, tool, product) (ATM) Software that produces PostScript outline fonts on screen and paper. There are versions that run under Microsoft Windows and on the Macintosh. ATM can do hinting, multiple master and anti-aliasing.
- alarm clock briton — a British worker with a moderate income, whose daily routine involves preparing children for school and going out to work
- algebraic geometry — the study of sets that are defined by algebraic equations.
- ammonium carbamate — a white soluble crystalline compound produced by reaction between dry ammonia and carbon dioxide and used as a nitrogen fertilizer. Formula: (NH4)CO2NH2
- ammonium carbonate — an unstable pungent soluble white powder that is a double salt of ammonium bicarbonate and ammonium carbamate: used in the manufacture of baking powder, smelling salts, and ammonium compounds. Formula: (NH4)HCO3.(NH4)CO2NH2
- assignment problem — (mathematics, algorithm) (Or "linear assignment") Any problem involving minimising the sum of C(a, b) over a set P of pairs (a, b) where a is an element of some set A and b is an element of set B, and C is some function, under constraints such as "each element of A must appear exactly once in P" or similarly for B, or both. For example, the a's could be workers and the b's projects. The problem is "linear" because the "cost function" C() depends only on the particular pairing (a, b) and is independent of all other pairings.
- astrometric binary — a binary star that can be recognized as such because of its undulating proper motion.
- at boardroom level — among directors
- bachelor apartment — a flat consisting of one room that is used as a sitting room and bedroom, as well as a kitchenette and a bathroom
- ballistocardiogram — a tracing made by a ballistocardiograph
- barium thiosulfate — a white, crystalline, water-insoluble, poisonous solid, BaS 2 O 3 ⋅H 2 O, used chiefly in the manufacture of explosives, matches, paints, and varnishes.
- basal conglomerate — a conglomerate deposited on an erosion surface and constituting the bottom layer of a stratigraphic series.
- battery eliminator — eliminator (def 2).
- battery-eliminator — a person or thing that eliminates.
- battle of omdurman — a battle (1898) in which the Mahdi's successor and his Ansar followers were defeated by Lord Kitchener's British forces
- beefsteak mushroom — an edible bracket fungus, Fistulina hepatica, that grows on trees and can rot the heartwood of living oaks and chestnuts.
- benchmark position — a public service job used for comparison with a similar position, such as a position in commerce, for wage settlements
- bernard montgomery — Bernard Law, 1st Viscount Montgomery of Alamein ("Monty") 1887–1976, British field marshal: World War II commander of British 8th Army in Africa and Europe.
- bernard of menthon — Saint(11th cent.); Fr. monk who founded hospices in the Swiss Alps: his day is May 28
- best-ball foursome — a match, scored by holes, between two pairs of players, in which the score of the lower scoring member of each pair is taken as their score for the hole.
- bichromate process — any of several methods of photography in which the light-sensitive medium is alkaline bichromate associated with a colloid such as gum, albumen, or gelatin.
- bioinstrumentation — the use of instruments, as sensors, to detect and measure certain body functions, as of persons in spaceflight, and transmit the data to a point where it is evaluated
- bottom dead center — Bottom dead center is the point at which the piston of an engine is nearest to the axis of the crankshaft. On a vertical engine, this is the lowest point that the piston reaches.
- bottom dead centre — the position of the crank of a reciprocating engine when the piston is at its nearest point to the crankshaft
- bounty-fed farmers — farmers who benefit from subsidies
- brand-name product — A brand-name product is one which is made by a well-known manufacturer and has the manufacturer's label on it.
- british somaliland — a former British protectorate (1884–1960) in E Africa, on the Gulf of Aden: united with Italian Somaliland in 1960 to form Somalia (or the Somali Republic); in 1991 the self-styled republic of Somaliland, covering the same area as the former British Somaliland, declared itself independent and continues to function largely as a separate entity, though without international recognition
- bromochloromethane — chlorobromomethane.
- brothers karamazov — a novel (1880) by Dostoevsky.
- burkitt's lymphoma — a cancer characterized by tumors containing lymphoid cells, occurring esp. in children, in the jaw, eyes, and internal organs: it is associated with the Epstein-Barr virus
- cabinet government — parliamentary government.
- cambrian mountains — a mountain range in Wales, extending from Carmarthenshire in the S to Denbighshire in the N. Highest peak: Aran Fawddwy, 891 m (2970 ft)
- chlorobromomethane — a clear, colorless, volatile, nonflammable liquid, CH 2 ClBr, used chiefly as an extinguishing agent in fire extinguishers and as a solvent in organic synthesis.
- combination square — an adjustable device for carpenters, used as a try square, miter square, level, etc.
- combined operation — a military operation carried out jointly by allied forces
- combustion chamber — an enclosed space in which combustion takes place, such as the space above the piston in the cylinder head of an internal-combustion engine or the chambers in a gas turbine or rocket engine in which fuel and oxidant burn
- combustion furnace — a furnace used in the laboratory to carry out elemental analysis of organic compounds
- come back to earth — to return to reality from a fantasy or daydream
- complementary base — either of the nucleotide bases linked by a hydrogen bond on opposite strands of DNA or double-stranded RNA: guanine is the complementary base of cytosine, and adenine is the complementary base of thymine in DNA and of uracil in RNA.
- cumbrian mountains — a mountain range in NW England, in Cumbria. Highest peak: Scafell Pike, 977 m (3206 ft)
- diamondback turtle — any edible North American terrapin of the genus Malaclemys, esp M. terrapin, occurring in brackish and tidal waters and having diamond-shaped markings on the shell: family Emydidae
- electronic mailbox — a device used to store electronic mail
- farmer-labor party — a political party in Minnesota, founded in 1920 and merged with the Democratic Party in 1944.
- fire and brimstone — When people talk about fire and brimstone, they are referring to hell and how they think people are punished there after death.
- fire-and-brimstone — threatening punishment in the hereafter: a fire-and-brimstone sermon.
- flat-bottomed rail — a rail having a cross section like an inverted T, with the top extremity enlarged slightly to form the head
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