18-letter words containing u, d, c
- old curiosity shop — a novel (1840–41) by Dickens.
- on delicate ground — in a situation requiring tact
- optical soundtrack — the final soundtrack on a motion picture, which appears as a band of black and white serrations along a strip of film to the left of the composite print. Light is shined through the serrations and is converted to audible sound.
- orthopedic surgery — corrective operation on bones or joints
- orthotungstic acid — an oxyacid acid of tungsten. Formula: H2WO4
- oxalosuccinic acid — an organic acid, C 6 H 6 O 7 , that is an intermediate formed by the dehydrogenation of isocitric acid in fat and carbohydrate metabolism.
- paediatric nursing — the branch of nursing concerned with the care of children
- parallel reduction — A form of applicative order reduction in which all redexes in an expression are reduced simultaneously. Variants include parallel outermost reduction and lenient reduction. See normal order reduction.
- pennsylvania dutch — the descendants of 17th- and 18th-century settlers in Pennsylvania from southwest Germany and Switzerland.
- perceptual defence — the process by which it is thought that certain stimuli are either not perceived or are distorted due to their offensive, unpleasant, or threatening nature
- percussion welding — a form of resistance welding in which the required pressure is provided by a hammerlike blow.
- perpetual calendar — a calendar devised to be used for many years, as in determining the day of the week on which a given date falls.
- physical education — systematic instruction in sports, exercises, and hygiene given as part of a school or college program.
- pig-tailed macaque — a forest-dwelling southeast Asian macaque, Macaca nemestrina, having a short, curled tail, colonized for animal behavior studies.
- pitch-and-run shot — chip shot.
- play cat and mouse — Also called cat and rat. a children's game in which players in a circle keep a player from moving into or out of the circle and permit a second player to move into or out of the circle to escape the pursuing first player.
- plenary indulgence — a remission of the total temporal punishment that is still due to sin after absolution. Compare indulgence (def 6).
- 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.
- pour cold water on — If someone pours cold water on a plan or idea, they criticize it so much that people lose their enthusiasm for it.
- predicate calculus — predicate logic
- prefect of studies — a senior master in a Jesuit school or college
- process scheduling — multitasking
- product acceptance — the verification or acceptance that a manufactured item meets required specifications or standards and is usable for its purpose
- product life cycle — the four stages (introduction, growth, maturity, and decline) into one of which the sales of a product fall during its market life
- production company — an organization which produces, films, plays, television or radio programmes
- production control — the planning and supervision of manufacturing activities to ensure that goods will be produced on time at the lowest possible cost.
- production manager — a supervisor of the budget, crew and other details in the production of a film or play
- productivity bonus — an extra payment made to workers for being more productive or yielding more favourable results than normal
- protective custody — detention of a person by the police solely as protection against a possible attack or reprisal by someone.
- protocol data unit — (PDU) A packet of data passed across a network. The term implies a specific layer of the OSI seven layer model and a specific protocol.
- provably difficult — The set or property of problems for which it can be proven that no polynomial-time algorithm exists, only exponential-time algorithms.
- pseudo-anarchistic — a person who advocates or believes in anarchy or anarchism.
- pseudo-competitive — of, pertaining to, involving, or decided by competition: competitive sports; a competitive examination.
- pseudo-socialistic — of or relating to socialists or socialism.
- pseudo-symptomatic — pertaining to a symptom or symptoms.
- pseudoappendicitis — inflammation of the vermiform appendix.
- pseudointellectual — a person exhibiting intellectual pretensions that have no basis in sound scholarship.
- pseudotuberculosis — an acute, sometimes fatal disease of rodents, birds, and other animals, including humans, caused by the bacterium Yersinia (Pasteurella) pseudotuberculosis, and characterized by the formation of nodules resembling those that result from tuberculosis.
- public expenditure — spending by central government, local authorities, and public corporations
- put a bold face on — to seem bold or confident about
- puvis de chavannes — Puvis de [py-vee duh] /püˈvi də/ (Show IPA), Puvis de Chavannes, Pierre.
- pyromucic aldehyde — furfural.
- pyrosulphuric acid — a fuming liquid acid made by adding sulphur trioxide to concentrated sulphuric acid. Formula: H2S2O7
- quadratic equation — an equation containing a single variable of degree 2. Its general form is ax 2 + bx + c = 0, where x is the variable and a, b, and c are constants (a ≠ 0).
- quinacrine mustard — a nitrogen mustard derived from mepacrine and used as a stain for chromosomes
- radiocommunication — communication by means of radio waves
- red cluster pepper — a tropical, woody plant, Capsicum annuum fasciculatum, having erect, very pungent, red fruit in small clusters.
- red mercuric oxide — a slightly crystalline, water-soluble, poisonous compound, HgO, occurring as a coarse, orange-red powder (red mercuric oxide) or as a fine, orange-yellow powder (yellow mercuric oxide) used chiefly as a pigment in paints and as an antiseptic in pharmaceuticals.
- reduction division — the first division of meiosis in which the number of chromosomes is reduced to half the original number.
- reduction strategy — (theory) An algorithm for deciding which redex(es) to reduce next. Different strategies have different termination properties in the presence of recursive functions or values. See string reduction, normal order reduction, applicative order reduction, parallel reduction