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20-letter words containing a, d, o, p, t

  • 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
  • ophthalmodynamometer — a device for determining the nearest point of ocular convergence.
  • 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
  • palos verdes estates — a town in S California.
  • 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.
  • 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)
  • paternal grandmother — the mother of someone's father
  • peasecod breastplate — a breastplate having a long central ridge terminating in a raised area overhanging the waistline.
  • 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.
  • personnel department — business: human resources
  • 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.
  • portuguese water dog — one of a breed of medium-sized dogs originally developed to assist Portuguese fishermen and having a profuse black or brown coat with or without white markings and webbed feet.
  • possessive adjective — See at possessive (def 4a).
  • post-order traversal — traversal
  • postal delivery zone — zone (def 10).
  • postgraduate student — a student who has obtained a degree from a university, etc, and is pursuing studies for a more advanced qualification
  • 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
  • powhatan confederacy — a network of Algonquian-speaking Indian settlements in Virginia that was ruled by Powhatan.
  • predicate nominative — (in Latin, Greek, and certain other languages) a predicate noun or adjective in the nominative case.
  • 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
  • procedural agreement — regulations agreed between the parties to collective bargaining, defining the bargaining units, bargaining scope, procedures for collective bargaining, and the facilities to be provided to trade union representatives
  • 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
  • pseudoparenchymatous — (in certain fungi and red algae) a compact mass of tissue, made up of interwoven hyphae or filaments, that superficially resembles plant tissue.
  • public administrator — an official of a city, county, or state government.
  • put the hard word on — to ask or demand something from
  • rapid reaction force — a force that can be deployed swiftly to a site of conflict or potential conflict
  • 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)
  • 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
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