20-letter words containing a, d, p, t, i
- new democratic party — the Canadian social democratic party formed in 1961
- nondirective therapy — client-centered therapy.
- nonrepeating decimal — a decimal representation of any irrational number, having the property that no sequence of digits is repeated ad infinitum.
- occupational disease — Also called industrial disease. a disease caused by the conditions or hazards of a particular occupation.
- operant conditioning — conditioning (def 1).
- operating conditions — Operating conditions are a set of conditions for operating a particular system or process.
- operational database — (database) A database containing up-to-date, modifiable data, in contrast to a decision support database.
- operator overloading — overloading
- optical mark reading — the reading of marks by an optical device whereby the information can be stored in machine-readable form
- orthopaedic mattress — a specially firm mattress designed to help correct or ameliorate the discomfort of disorders of the spine and joints
- orthophosphoric acid — a colorless, crystalline solid, H 3 PO 4 , the tribasic acid of pentavalent phosphorus: used chiefly in fertilizers, as a source of phosphorus salts, and in soft drinks as an acidulant and flavoring agent.
- paint the town (red) — to go on a boisterous spree; carouse
- parallel of altitude — almucantar.
- parallel of latitude — parallel (def 9).
- parataxic distortion — a distortion in perception, especially of interpersonal relationships, based on a tendency to perceive others in accordance with a pattern determined by previous experiences.
- partial differential — an expression obtained from a given function of several variables by taking the partial derivative with respect to one of the variables and multiplying by the increment in that variable.
- partitioned data set — (file format) (PDS) A data set on an IBM mainframe that contains members, each of which acts like a separate data set. Partitioned data sets are more space-efficient than individual data sets, because they can put more than one data set on a track. They are also used to hold libraries, with one function per member. The syntax for a member is NAME.OF.PDS(MEMBER) although some systems (such as Phoenix) could use NAME.OF.PDS:MEMBER Original PDSes were of fixed size, and needed frequent compression to recover space after deleting or changing members. Newer PDS/E Extended PDSes do not have this problem.
- pass the time of day — to exchange casual greetings (with an acquaintance)
- pedal steel (guitar) — a steel guitar mounted on legs and equipped with pedals that serve as an additional means of changing pitch
- pentobarbital sodium — a barbiturate drug used in medicine as a sedative and hypnotic. Formula: C11H17N2O3Na
- pentose nucleic acid — a nucleic acid containing a pentose.
- periarteritis nodosa — polyarteritis.
- periodontal membrane — the collagenous, fibrous connective tissue between the cementum of the tooth and the alveolus.
- perpendicular gothic — the style of Gothic architecture in England during the 14th and 15th centuries, characterized by tracery having vertical lines, a four-centred arch, and fan vaulting
- personality disorder — any of a group of mental disorders characterized by deeply ingrained maladaptive patterns of behavior and personality style, which are usually recognizable as early as adolescence and are often lifelong in duration.
- phenyldiethanolamine — a white, crystalline, slightly water-soluble substance, C 1 0 H 1 5 NO 2 , used in the manufacture of dyes and in organic synthesis.
- physical double star — two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together and comprise a single physical system (physical double star)
- pleased with oneself — If someone seems very satisfied with something they have done, you can say that they are pleased with themselves, especially if you think they are more satisfied than they should be.
- possessive adjective — See at possessive (def 4a).
- postal delivery zone — zone (def 10).
- postnatal depression — a form of clinical depression that occurs in mothers after the birth of a baby
- potassium dichromate — an orange-red crystalline soluble solid substance that is a good oxidizing agent and is used in making chrome pigments and as a bleaching agent. Formula: K2Cr2O7
- potential difference — voltage
- pound cost averaging — a method of accumulating capital by investing a fixed sum in a particular security at regular intervals, in order to achieve an average purchase price below the arithmetic average of the market prices on the purchase dates
- predicate nominative — (in Latin, Greek, and certain other languages) a predicate noun or adjective in the nominative case.
- presidential primary — a direct primary for the selection of state delegates to a national party convention and the expression of preference for a U.S. presidential nominee.
- price discrimination — the practice of offering identical goods to different buyers at different prices, when the goods cost the same.
- price-dividend ratio — the ratio of the price of a share on a stock exchange to the dividends per share paid in the previous year, used as a measure of a company's potential as an investment
- production agreement — a contract concerning the production or manufacture of something
- prohibited substance — a substance, such as a drug, etc, that is banned or forbidden by law or other authority
- proprietary medicine — a drug or agent manufactured and distributed under a trade name
- public administrator — an official of a city, county, or state government.
- rapid reaction force — a force that can be deployed swiftly to a site of conflict or potential conflict
- rapid transit system — a rail or other system providing rapid public transport
- read-eval-print loop — (language, LISP, programming) (REPL) A programming structure within LISP which repeatedly reads a form from the user, evaluates it, and displays the result. A read-eval-print loop forms the basis of the Top-Level shell that programmers of the LISP family of languages interact with. In many dialects of LISP a very simple REPL could be implemented as: (loop (print (eval (read)))). (2003-06-23)
- red-legged partridge — a partridge, Alectoris rufa, having a reddish tail, red legs and bill, and flanks barred with chestnut, black, and white: common on farmlands and heaths in SW Europe, including Britain
- refuse disposal unit — a unit or part of a sink that disposes of waste food, etc, by grinding
- regional development — aid-giving to poorer areas or countries
- relative deprivation — the perception of an unfair disparity between one's situation and that of others.
- rhineland-palatinate — a state in W Germany: formerly part of Rhine Province. 7655 sq. mi. (19,825 sq. km). Capital: Mainz.