23-letter words containing h, r, d, i, a
- acquired characteristic — a characteristic of an organism that results from increased use or disuse of an organ or the effects of the environment and cannot be inherited
- advanced skills teacher — a teacher who has achieved high standards of classroom practice and success and who, after passing a national assessment, is paid to share his or her skills and experience with other teachers
- alpha-ketoglutaric acid — a dibasic keto acid, C 5 H 6 O 5 , that occurs as an intermediate in the Krebs' cycle and in protein metabolism.
- archaeomagnetism dating — the dating of archaeological specimens by determination of the magnetic alignment of objects containing ferromagnetic materials, as baked clay pots, within undisturbed archaeological sites.
- battered child syndrome — the array of physical injuries exhibited by young children who have been beaten repeatedly or otherwise abused by their parents or guardians.
- black-throated whipbird — an Australian whipbird, Psophodes nigrogularis
- brinell hardness number — a measure of the hardness of a material obtained by pressing a hard steel ball into its surface; it is expressed as the ratio of the load on the ball in kilograms to the area of the depression made by the ball in square millimetres
- british and irish lions — a touring rugby union side composed of players invited from England, Scotland, Wales, and Ireland
- cachoeiro do itapemirim — a city in SE Brazil.
- catherine of alexandria — Saint, a.d. c310, Christian martyr.
- chi-square distribution — a continuous single-parameter distribution derived as a special case of the gamma distribution and used esp to measure goodness of fit and to test hypotheses and obtain confidence intervals for the variance of a normally distributed variable
- chief education officer — an official who is the chief administrative officer of a Local Education Authority
- 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
- 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.
- computerized tomography — a radiological technique that produces images of cross sections through a patient's body using low levels of radiation
- cyclic redundancy check — (algorithm) (CRC or "cyclic redundancy code") A number derived from, and stored or transmitted with, a block of data in order to detect corruption. By recalculating the CRC and comparing it to the value originally transmitted, the receiver can detect some types of transmission errors. A CRC is more complicated than a checksum. It is calculated using division either using shifts and exclusive ORs or table lookup (modulo 256 or 65536). The CRC is "redundant" in that it adds no information. A single corrupted bit in the data will result in a one bit change in the calculated CRC but multiple corrupted bits may cancel each other out. CRCs treat blocks of input bits as coefficient-sets for polynomials. E.g., binary 10100000 implies the polynomial: 1*x^7 + 0*x^6 + 1*x^5 + 0*x^4 + 0*x^3 + 0*x^2 + 0*x^1 + 0*x^0. This is the "message polynomial". A second polynomial, with constant coefficients, is called the "generator polynomial". This is divided into the message polynomial, giving a quotient and remainder. The coefficients of the remainder form the bits of the final CRC. So, an order-33 generator polynomial is necessary to generate a 32-bit CRC. The exact bit-set used for the generator polynomial will naturally affect the CRC that is computed. Most CRC implementations seem to operate 8 bits at a time by building a table of 256 entries, representing all 256 possible 8-bit byte combinations, and determining the effect that each byte will have. CRCs are then computed using an input byte to select a 16- or 32-bit value from the table. This value is then used to update the CRC.
- dacryocystorhinostomies — Plural form of dacryocystorhinostomy.
- descriptive metaphysics — the philosophical study of the structure of how we think about the world
- dichlorodifluoromethane — a colourless nonflammable gas easily liquefied by pressure: used as a propellant in aerosols and fire extinguishers and as a refrigerant. Formula: CCl2F2
- differential psychology — the branch of psychology dealing with the study of characteristic differences or variations of groups or individuals, especially through the use of analytic techniques and statistical methods.
- differential weathering — the difference in degree of discoloration, disintegration, etc., of rocks of different kinds exposed to the same environment.
- direct characterization — the process by which the personality of a fictitious character is revealed by the use of descriptive adjectives, phrases, or epithets.
- director of photography — the person who is responsible for all operations concerning camera work and lighting during the production of a film.
- dishonourable discharge — dismissal from the US armed forces by a court martial as a result of serious misconduct
- draw a line in the sand — to put a stop to or a limit on
- drawing exchange format — (DXF) A file format for graphical information, similar to IGES. Commonly used by CAD systems like AutoCAD.
- earthquake-proof design — Earthquake-proof design is design which will not be badly damaged by earthquakes or tsunamis.
- electrostatic discharge — (hardware, testing) (ESD) One kind of test that hardware usually has to pass to prove it is suitable for sale and use. The hardware must still work after is has been subjected to some level of electrostatic discharge. Some organisations have their own ESD requirements which hardware must meet before it will be considered for purchase. Different countries have different legal regulations about levels of ESD. See also Radio Frequency Interference, Electromagnetic Compatibility.
- extended graphics array — (hardware) (XGA) An IBM display standard introduced in 1990. XGA supports a resolution of 1024 x 768 pixels with a palette of 256 colours, or 640 x 480 with high colour (16 bits per pixel). XGA-2 added 1024 x 768 support for high colour and higher refresh rates, improved performance, and supports 1360 x 1024 in 16 colours. XGA is probably not the same as 8514-A. See also VESA's EVGA released at a similar time.
- extended reach drilling — Extended reach drilling is drilling a well horizontally to at least twice its vertical depth.
- fendalton shopping cart — a four-wheel drive recreational vehicle
- fifth marquis lansdowne — Henry Charles Keith, 5th Marquis of Lansdowne, Lansdowne, 5th Marquis of.
- fish in troubled waters — any of various cold-blooded, aquatic vertebrates, having gills, commonly fins, and typically an elongated body covered with scales.
- front-end hydrogenation — Front-end hydrogenation is a catalytic process in the early stages of refining which involves the reaction of the carbon-carbon double bond in alkenes with hydrogen.
- grant-maintained school — a school funded directly by central government
- greater spotted dogfish — a cat shark found in the Northeast Atlantic, Scyliorhinus stellaris
- handwriting on the wall — writing done with a pen or pencil in the hand; script.
- harvard mark ii machine — (computer, history) A relay-based computer designed and built by Howard Aiken, with support from IBM, for the United States Navy's Naval Proving Ground, between 1942 - 1947. The Harvard Mark II was the second in a series of four electro-mechanical computers that were forerunners of the ENIAC.
- hate-driven development — (programming, humour) A play on test-driven development for use when a piece of code is not necessarily broken but you hate the way it is written so much that you feel compelled to rewrite it.
- have struck/hit paydirt — If you say that someone has struck paydirt or has hit paydirt, you mean that they have achieved sudden success or gained a lot of money very quickly.
- higher national diploma — a work-related higher education qualification, taking two years full-time.
- hold on like grim death — to hold very firmly or resolutely
- hollerithabetical order — (algorithm) Sorted into the order a standard Hollerith card sorting machine produces, with special characters interleaved within the alphabet.
- hortense de beauharnais — Beauharnais, Eugénie Hortense de.
- icosidodecadodecahedron — A polyhedron having 44 faces, 60 vertices, 120 edges, 12 self intersected faces and 12 nonconvex faces.
- industrial psychologist — a person who studies human behaviour and cognitive processes in relation to the working environment
- inherently safer design — Inherently safer design is when a lot of consideration is given to safety when designing a process.
- intermediate technology — technology which combines sophisticated ideas with cheap and readily available materials, esp for use in developing countries
- light and shade surface — (in architectural shades and shadows) a surface in a plane tangent to the parallel rays from the theoretical light source, treated as a shade surface.
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