18-letter words containing u, d, m, r, t
- instrument landing — an aircraft landing accomplished by use of gauges on the instrument panel and ground-based radio equipment, with limited reference to outside visual signals.
- justice department — the United States federal department for enforcing federal laws
- logarithmus dualis — (mathematics) (ld) Latin for logarithm base two. More commonly written as "log" with a subscript "2". Roughly the number of bits required to represent an integer.
- loschmidt's number — the number of molecules in one cubic centimeter of an ideal gas at standard temperature and pressure, equal to 2.687 × 10 19.
- manufactured goods — products made by machine
- marine underwriter — an underwriter who specializes in marine insurance
- mato grosso do sul — a state of W central Brazil: formed in 1979 from part of Mato Grosso state. Capital: Campo Grande. Pop: 2 140 624 (2002). Area: 350 548 sq km (135 318 sq miles)
- middleburg heights — a town in N Ohio.
- milkweed butterfly — monarch butterfly.
- misunderestimation — (nonstandard) An inaccurate underestimation, or an act of misunderestimating.
- mixed-flow turbine — a water turbine in which water flows radially and axially through the rotating vanes
- modular arithmetic — arithmetic in which numbers that are congruent modulo a given number are treated as the same. Compare congruence (def 2), modulo, modulus (def 2b).
- modulus of torsion — a coefficient of elasticity of a substance, expressing the ratio between the force per unit area (shearing stress) that laterally deforms the substance and the shear (shearing strain) that is produced by this force.
- multi-user dungeon — Multi-User Dimension
- muscular dystrophy — a hereditary disease characterized by gradual wasting of the muscles with replacement by scar tissue and fat, sometimes also affecting the heart.
- national guardsman — guardsman (def 2).
- neurodevelopmental — Of or pertaining to the development of neurological pathways in the brain.
- nonstriated muscle — smooth muscle
- numerical identity — the relation that holds between two relata when they are the selfsame entity, that is, when the terms designating them have the same reference
- order of magnitude — You can use order of magnitude when you are giving an approximate idea of the amount or importance of something.
- population pyramid — a graph showing the distribution of a population by sex, age, etc.
- potassium chloride — a white or colorless, crystalline, water-soluble solid, KCl, used chiefly in the manufacture of fertilizers and mineral water, and as a source of other potassium compounds.
- potassium fluoride — a white, crystalline, hygroscopic, toxic powder, KF, used chiefly as an insecticide, a disinfectant, and in etching glass.
- production company — an organization which produces, films, plays, television or radio programmes
- production manager — a supervisor of the budget, crew and other details in the production of a film or play
- programme of study — the prescribed syllabus that pupils must be taught at each key stage in the National Curriculum
- prometheus unbound — a drama in verse (1820) by Shelley.
- pyramus and thisbe — (in Greek legend) two lovers of Babylon: Pyramus, wrongly supposing Thisbe to be dead, killed himself and she, encountering him in his death throes, did the same
- quartz-iodine lamp — a type of tungsten-halogen lamp containing small amounts of iodine and having a quartz envelope, operating at high temperature and producing an intense light for use in car headlamps, etc
- quinacrine mustard — a nitrogen mustard derived from mepacrine and used as a stain for chromosomes
- radiocommunication — communication by means of radio waves
- redundancy payment — a sum of money given by an employer to an employee who has been made redundant: usually calculated on the basis of the employee's rate of pay and length of service
- repayment schedule — a document detailing the specific terms of a borrower's loan, such as monthly payment, interest rate, due dates etc
- residual magnetism — remanence.
- run length limited — (storage) (RLL) The most popular scheme for encoding data on magnetic disks. RLL packs up to 50% more data on a disk than MFM. Groups of bits are mapped to specific patterns of flux. The density of flux transitions is limited by the spatial resolution of the disk and frequency response of the head and electronics. However, transitions must be close enough to allow reliable clock recovery. RLL implementations vary according to the minimum and maximum allowed numbers of transition cells between transitions. For example, the most common variant today, RLL 1,7, can have a transition in every other cell and must have at least one transition every seven cells. The exact mapping from bits to transitions is essentially arbitrary. Other schemes include GCR, FM, Modified Frequency Modulation (MFM). See also: PRML.
- runge-kutta method — a numerical method, involving successive approximations, used to solve differential equations.
- second triumvirate — the coalition and joint rule of the Roman Empire by Antony, Lepidus, and Octavian, begun in 43 bc
- sodium bicarbonate — a white, crystalline, water-soluble solid, in powder or granules, NaHCO 3 , usually prepared by the reaction of soda ash with carbon dioxide or obtained from the intermediate product of the Solvay process by purification: used chiefly in the manufacture of sodium salts, baking powder, and beverages, as a laboratory reagent, as a fire extinguisher, and in medicine as an antacid.
- sodium tetraborate — borax1 .
- squinting modifier — a word or phrase that can modify either the words that precede it or those that follow, as frequently in the sentence Studying frequently is tedious.
- strontium monoxide — a white insoluble solid substance used in making strontium salts and purifying sugar. Formula: SrO
- sun-dried tomatoes — tomatoes that have been dried or preserved by exposure to the sun
- super middleweight — a boxer weighing up to 168 pounds (75.6 kg), between middleweight and light heavyweight.
- the movie industry — the industry that makes entertainment films or movies
- the-master-builder — a play (1892) by Ibsen.
- third man argument — (in the philosophy of Aristotle) the argument against the existence of Platonic Forms that since the Form of Man is itself a perfect man, a further form (the "third" man) would be required to explain this, and so ad infinitum
- to close your mind — If you close your mind to something, you deliberately do not think about it or pay attention to it.
- to cross your mind — If you say that an idea or possibility never crossed your mind, you mean that you did not think of it.
- to cut the mustard — If someone does not cut the mustard, their work or their performance is not as good as it should be or as good as it is expected to be.
- to speak your mind — If you speak your mind, you say firmly and honestly what you think about a situation, even if this may offend or upset people.