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23-letter words containing t, r

  • chinese trumpet creeper — a showy, woody vine, Campsis grandiflora, of China, having aerial rootlets and large red flowers.
  • chlorotrifluoroethylene — a colorless, flammable gas, C 2 H 2 ClF, that polymerizes to form oils, greases, and waxes.
  • chorionic gonadotrophin — a hormone secreted by the chorionic villi of the placenta in mammals, esp human chorionic gonadotrophin. It promotes the secretion of progesterone by the corpus luteum and its presence in the urine is an indication of pregnancy
  • chronic wasting disease — a disease found among members of the deer family, a type of transmissible spongiform encephalopathy
  • church of the subgenius — (body, humour)   A mutant offshoot of Discordianism launched in 1981 as a spoof of fundamentalist Christianity by the "Reverend" Ivan Stang, a brilliant satirist with a gift for promotion. Popular among hackers as a rich source of bizarre imagery and references such as "Bob" the divine drilling-equipment salesman, the Benevolent Space Xists, and the Stark Fist of Removal. Much SubGenius theory is concerned with the acquisition of the mystical substance or quality of slack.
  • circumstantial evidence — indirect evidence that tends to establish a conclusion by inference
  • citizens' advice bureau — an independent charity where the public can obtain free, confidential information and advice on an extensive range of civil, consumer, and legal matters
  • citrus greening disease — Plant Pathology. a bacterial disease of citrus trees, transmitted by insects of the Psyllidae family.
  • civil aeronautics board — the former federal agency (1938–85) that regulated airline fares and assigned routes. Abbreviation: CAB, C.A.B.
  • client-centered therapy — a nondirective method of psychotherapy in which treatment consists of helping patients to use effectively their own latent resources in solving problems.
  • coefficient of friction — the force required to move two sliding surfaces over each other, divided by the force holding them together. It is reduced once the motion has started
  • combinatorial chemistry — the use of chemical methods to generate all possible combinations of chemicals
  • come apart at the seams — come unstitched
  • come hell or high water — If you say that you will do something come hell or high water, you are emphasizing that you are determined to do it, in spite of the difficulties involved.
  • come with the territory — If you say that something comes with the territory, you mean that you accept it as a natural result of the situation you are in.
  • commercial exploitation — unethical business practices
  • communication breakdown — a lack of communication; a failure to exchange information
  • communication interface — an electronic circuit, usually designed to a specific standard, that enables one machine to telecommunicate with another machine
  • communications software — (communications, software)   Application programs, operating system components, and probably firmware, forming part of a communication system. These different software components might be classified according to the functions within the Open Systems Interconnect model which they provide. Typical applications include a web browser, Mail User Agent, chat and telnet.
  • communist international — Third International.
  • communist-international — an international organization (1919–43), founded in Moscow, uniting Communist groups of various countries and advocating the attainment of their ends by violent revolution. Also called Comintern, Communist International. Compare international (def 6).
  • community health centre — a medical centre that serves a particular area
  • community-service order — (in Britain) a court order requiring an offender over seventeen years old to do unpaid socially beneficial work under supervision instead of going to prison
  • compact disc read-write — Compact Disc Rewritable
  • compact disc recordable — (storage)   (CD-R) A write-once version of CD-ROM. CD-Rs can hold about 650 megabytes of data. They are very durable and can be read by normal CD-ROM drives, but once data has been written it cannot be altered. Standard prerecorded CDs have their information permanently stamped into an aluminium reflecting layer. CD-R discs have a dye-based recording layer and an additional golden reflecting layer. Digital information is written to the disc by burning (forming) pits in the recording layer in a pattern corresponding to that of a conventional CD. The laser beam heats the substrate and recording layer to approximately 250 C. The recording layer melts and the substrate expands into the space that becomes available. See also CD-RW and DVD-RAM.
  • compact disc rewritable — (storage)   (CD-RW) A rewritable version of CD-ROM. A CD-RW drive can write about 650 megabytes of data to CD-RW media an unlimited number of times. Most CD-RW drives can also write once to CD-R media. CD-RW media cannot be read by CD-ROM drives built prior to 1997 due to the reduced reflectivity (15% compared to 70%) of CD-RW media. CD-RW drives and media are currently (1999) more expensive than CD-R drives and media. CD-R is sometimes considered a better technology for archival purposes as the data cannot be accidentally modified or tampered with, and encourages better archival practices. Standard prerecorded CDs have their information permanently stamped into an aluminium reflecting layer. CD-WR discs have a phase-change recording layer and an additional silver (aluminium) reflecting layer. A laser beam can melt crystals in the recording layer into a non-crystalline amorphous phase or anneal them slowly at a lower temperature back to the crystalline state. The different reflectance of the areas make them appear as the 'pits' and 'lands' of a standard CD. See also CD-R and DVD-RAM.
  • comparative advertising — a form of advertising in which a product is compared favourably with similar products on the market
  • comparative linguistics — the study of the correspondences between languages that have a common origin.
  • completely normal space — a normal topological space in which every subspace is normal.
  • composite colour signal — a colour television signal in which luminance and two chrominance components are encoded into a single signal
  • computer-aided learning — Computer-Aided Instruction
  • computer-based training — Computer-Aided Instruction
  • computerized tomography — a radiological technique that produces images of cross sections through a patient's body using low levels of radiation
  • concertgebouw orchestra — an Amsterdam orchestra, established in 1888, that has been independent of the Concertgebouw hall since World War II
  • concrete data structure — (theory)   (CDS) A model of programming language terms developed in the context of constructing fully abstract semantics for sequential languages. A CDS is a 4-tuple (C,V,E,|-) where C is a cell, V is a value, E is an event and |- is an "enabling relation". An event is a cell and a value. A cell C is "enabled" by a set of events S if S |- C. A state is a set of events which are consistent in that the values they give for any cell are all equal. Every cell in a state is enabled.
  • condition code register — a hardware register used for storing the current values of the condition codes
  • conditional convergence — the property of an infinite series that converges while the series formed by replacing each term in the given series with its absolute value diverges; the property of an infinite series that converges when the order of the terms is altered. Compare absolute convergence (def 1).
  • conditional probability — the probability of one event, A, occurring given that another, B, is already known to have occurred: written P(A|B) and equal to P(A and B)|P(B)
  • conditioned suppression — the reduction in the frequency of a learned response, e.g. pressing a bar for water, that occurs when a stimulus previously associated with pain is present
  • conformational analysis — the study of the spatial arrangement of atoms or groups of atoms in a molecule and the way in which this influences chemical behaviour
  • conjunctive normal form — (logic)   (CNF) A logical formula consisting of a conjunction of disjunctions of terms where no disjunction contains a conjunction. Such a formula might also be described as a product of sums. E.g. the CNF of (A and B) or C is (A or C) and (B or C). Contrast Disjunctive Normal Form.
  • connectionless protocol — (protocol)   The data communication method in which communication occurs between hosts with no previous setup. Packets sent between two hosts may take different routes.
  • conservative evaluation — (programming)   Under this parallel evaluation strategy, no evaluation is started unless it is known to be needed. The opposite of conservative evaluation is speculative evaluation.
  • consolidated deliveries — deliveries of goods to different shops in a common location by a single carrier and in a single vehicle
  • constant of gravitation — a law stating that any two masses attract each other with a force equal to a constant (constant of gravitation) multiplied by the product of the two masses and divided by the square of the distance between them.
  • constant of integration — a constant that is added to the function obtained by evaluating the indefinite integral of a given function, indicating that all indefinite integrals of the given function differ by, at most, a constant.
  • constitutional monarchy — a monarchy governed according to a constitution that limits and defines the powers of the sovereign
  • constraint satisfaction — (application)   The process of assigning values to variables while meeting certain requirements or "constraints". For example, in graph colouring, a node is a variable, the colour assigned to it is its value and a link between two nodes represents the constraint that those two nodes must not be assigned the same colour. In scheduling, constraints apply to such variables as the starting and ending times for tasks. The Simplex method is one well known technique for solving numerical constraints. The search difficulty of constraint satisfaction problems can be determined on average from knowledge of easily computed structural properties of the problems. In fact, hard instances of NP-complete problems are concentrated near an abrupt transition between under- and over-constrained problems. This transition is analogous to phase transitions in physical systems and offers a way to estimate the likely difficulty of a constraint problem before attempting to solve it with search.
  • constructive cost model — (programming)   (COCOMO) A method for estimating the cost of a software package, proposed by Dr Barry Boehm. The Basic COCOMO Model estimates the effort required to develop software in three modes of development (Organic Mode, Semidetached Mode, or Embedded Mode) using only DSIs as an input. The Basic model is good for quick estimates. The Intermediate Model extends the Basic Model with an Effort Adjustment Factor (EAF) and different coefficients for the effort equation. The user supplies settings for cost drivers that determine the effort and duration of the software projects. It also allows DSI values and cost drivers to be chosen for individual components instead of for the system as a whole. The Detailed COCOMO Model uses effort multipliers for each phase of the project and provides a three-level product hierarchy and has some other capabilities such as a procedure for adjusting the phase distribution of the development schedule.
  • consultant psychiatrist — a psychiatrist who has attained the rank of consultant
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