24-letter words containing t, y, r, a, e
- evolutionary programming — (EP) A stochastic optimisation strategy originally conceived by Lawrence J. Fogel in 1960. An initially random population of individuals (trial solutions) is created. Mutations are then applied to each individual to create new individuals. Mutations vary in the severity of their effect on the behaviour of the individual. The new individuals are then compared in a "tournament" to select which should survive to form the new population. EP is similar to a genetic algorithm, but models only the behavioural linkage between parents and their offspring, rather than seeking to emulate specific genetic operators from nature such as the encoding of behaviour in a genome and recombination by genetic crossover. EP is also similar to an evolution strategy (ES) although the two approaches developed independently. In EP, selection is by comparison with a randomly chosen set of other individuals whereas ES typically uses deterministic selection in which the worst individuals are purged from the population.
- extra-sensory perception — Extra-sensory perception means knowing without using your ordinary senses such as sight and hearing. Some people believe this is possible. The abbreviation ESP is also used.
- footloose and fancy-free — If you describe someone as footloose and fancy-free, you mean that they are not married or in a similar relationship, and you therefore consider them to have very few responsibilities or commitments.
- fray at/around the edges — If you say that something is fraying at the edges or is fraying around the edges, you mean that it has an uncertain or unsteady quality, for example because it is gradually being spoiled or destroyed.
- frequent-flyer programme — a plan or system under which frequent flyers earn rewards for being regular customers
- glycogen storage disease — any of several inherited disorders of glycogen metabolism that result in excess accumulation of glycogen in various organs of the body.
- grand unification theory — a possible future quantum field theory that would encompass both the electroweak theory and quantum chromodynamics. Abbreviation: GUT.
- great crested flycatcher — a North American flycatcher, Myiarchus crinitus, noted for its use of the castoff skins of snakes in building its nest.
- greater london authority — local government body of UK capital
- have a tiger by the tail — to find oneself in a situation that has turned out to be much more difficult to control than one had expected
- heart is a lonely hunter — a novel (1940) by Carson McCullers.
- hexaethyl tetraphosphate — a yellow, very poisonous liquid, (C 2 H 5 O) 6 P 4 O 7 , soluble in water, used as an insecticide.
- hierarchical file system — (file system) A file system in which the files are organised into a hierarchy. The nodes of the hierarchy are called directories while the leaves are the files themselves. See also root directory. Compare flat file system.
- high bypass ratio engine — a type of by-pass engine in which a large fan driven by a turbine and housed in a short duct forces air rearwards around the exhaust gases in order to increase the propulsive thrust
- hyperbetalipoproteinemia — An abnormally high level of betalipoprotein in the blood.
- ichthyophthirius-disease — ich.
- information superhighway — internet
- instructional technology — (education) Design, development, use, management and evaluation of process and resources for learning. Instructional technology aims to promote the application of validated, practical procedures in the design and delivery of instruction. It is often defined either in terms of media and other technology used (e.g. audiovisual media and equipment and computers), or in terms of a systematic process which encompasses instructional design, development, delivery and evaluation.
- internal auditory meatus — the canal extending through the petrous portion of the temporal bone, through which the glossopharyngeal nerve, the facial nerve, and the auditory nerve and artery pass.
- interventional radiology — an application of radiology that enables minimally invasive surgery to be performed with the aid of simultaneous radiological imaging of the field of operation within the body
- involuntary manslaughter — the unlawful but unintentional killing of a human being
- irritable bowel syndrome — any combination of common disturbances of the bowel, as diarrhea or constipation, occurring with abdominal pain, sometimes accompanied by psychological stress. Abbreviation: IBS.
- iterated function system — (graphics) (IFS) A class of fractals that yield natural-looking forms like ferns or snowflakes. Iterated Function Systems use a very easy transformation that is done recursively.
- kinetic theory of matter — a theory that matter is composed of small particles, all in random motion.
- lady washington geranium — show geranium.
- laryngotracheobronchitis — A respiratory disease, a form of croup.
- lithium aluminum hydride — a white powder, LiAlH 4 , used chiefly as a chemical reducing agent, especially in pharmaceutical and perfume manufacturing.
- magnetothermoelectricity — thermoelectricity induced or affected by a magnetic field.
- mathematical probability — the probability of an event consisting of n out of m possible equally likely occurrences, defined to be n/m
- minister plenipotentiary — plenipotentiary.
- money-market certificate — a certificate of deposit held for a specified term earning a fixed interest rate keyed to the interest rate of U.S. Treasury bills.
- motorway service station — an establishment off a motorway where drivers can refuel their vehicles, buy food, drink, etc
- mutual insurance company — an insurance company owned by the policyholders and not by shareholders
- narcissistic personality — a personality disorder characterized by extreme self-centeredness and self-absorption, fantasies involving unrealistic goals, an excessive need for attention and admiration, and disturbed interpersonal relationships.
- network operating system — (operating system) (NOS) The operating system on Control Data Corporation's Cyber Computer.
- neutrosophic probability — (logic) An extended form of probability based on Neutrosophy, in which a statement is held to be t true, i indeterminate, and f false, where t, i, f are real values from the ranges T, I, F, with no restriction on T, I, F or the sum n=t+i+f.
- non-proliferation treaty — an international agreement signed in 1968 which aims to reduce the spread of nuclear weapons
- not ready for prime time — Usable, but only just so; not very robust; for internal use only. Said of a program or device. Often connotes that the thing will be made more solid Real Soon Now. This term comes from the ensemble name of the original cast of "Saturday Night Live", the "Not Ready for Prime Time Players". It has extra flavour for hackers because of the special (though now semi-obsolescent) meaning of prime time. Compare beta.
- object-oriented analysis — (programming) (OOA) The first phase of object-oriented design.
- open system architecture — (operating system) (OSA) A competitor to IBM's SNA.
- parliamentary government — government by a body of cabinet ministers who are chosen from and responsible to the legislature and act as advisers to a nominal chief of state.
- people's liberation army — See under Huk (def 1).
- permeability coefficient — the volume of an incompressible fluid that will flow in unit time through a unit cube of a porous substance across which a unit pressure difference is maintained
- physiological atmosphere — ecosphere.
- polychlorinated biphenyl — PCB.
- polymer matrix composite — A polymer matrix composite is a material consisting of a composite made stronger by adding fibers or particles to it.
- preparatory to doing sth — If one action is done preparatory to another, it is done before the other action, usually as preparation for it.
- present company excepted — If you are making a general, unfavourable comment about a particular type of person, and you are with people of that type, you can say 'present company excepted' as a way of making your comment sound more polite.
- pretty amazing new stuff — (humour, communications) (PANS) What PSTN is evolving into.
- private-key cryptography — (cryptography) As opposed to public-key cryptography, a cryptographic method in which the same key is used to encrypt and decrypt the message. Private-key algorithms include the obsolescent Data Encryption Standard (DES), triple-DES (3DES), the Advanced Encryption Standard (AES), also known as Rijndael, Blowfish, Twofish RC2, RC4, RC5 and RC6. A problem with private-key cryptography is that the sender and the recipient of the message must agree on a common key via some alternative secure channel.