21-letter words containing h, a, r, d, c
- goldbach's conjecture — the conjecture that every even number greater than two is the sum of two prime numbers
- ground-effect machine — ACV (def 2).
- guaranteed scheduling — (algorithm) A scheduling algorithm used in multitasking operating systems that guarantees fairness by monitoring the amount of CPU time spent by each user and allocating resources accordingly.
- have one's cards read — If you have your cards read, you have your fortune told by someone who uses playing cards or tarot cards to tell you about yourself and predict your future.
- have the inside track — If you say that someone has the inside track, you mean that they have an advantage, for example special knowledge about something.
- hazard warning device — an appliance fitted to a motor vehicle that operates the hazard lights
- hierarchical database — (database) A kind of database management system that links records together like a family tree such that each record type has only one owner, e.g. an order is owned by only one customer. Hierarchical structures were widely used in the first mainframe database management systems. However, due to their restrictions, they often cannot be used to relate structures that exist in the real world.
- hindu-arabic numerals — Arabic numeral.
- horns and halo effect — a tendency to allow one's judgement of another person, esp in a job interview, to be unduly influenced by an unfavourable (horns) or favourable (halo) first impression based on appearances
- hydraulic accumulator — an apparatus in which gas, usually air, is used as a cushion or shock absorber in a hydraulic system.
- hyperbolic paraboloid — a paraboloid that can be put into a position such that its sections parallel to one coordinate plane are hyperbolas, with its sections parallel to the other two coordinate planes being parabolas.
- in co-ordination with — If you do something in co-ordination with someone else, you both organize your activities so that you work together efficiently.
- indicated horse-power — the horsepower of a reciprocating engine as shown by an indicator record. Abbreviation: ihp, IHP.
- industrial psychology — the application of psychological principles and techniques to business and industrial problems, as in the selection of personnel or development of training programs.
- joseph-marie jacquard — (person) /zhoh-zef' mah-ree' zhah-kar'/ (1752-07-07 to 1834-08-07) The inventor of the Jacquard loom.
- lactate dehydrogenase — an enzyme that catalyzes the interconversion of pyruvate and lactate, an important step in carbohydrate metabolism: elevated serum levels indicate injury to kidney, skeletal muscle, or heart muscle. Abbreviation: LDH.
- lady macbeth strategy — a strategy in a takeover battle in which a third party makes a bid acceptable to the target company, appearing to act as a white knight but subsequently joining forces with the original (unwelcome) bidder
- large hadron collider — a particle accelerator at the European Laboratory for Particle Physics near Geneva, containing a circular underground tunnel 27km (16.8 miles) in circumference, around which two streams of hadrons are sent in opposite directions before being brought together in a high-energy collision
- law of thermodynamics — any of three principles variously stated in equivalent forms, being the principle that the change of energy of a thermodynamic system is equal to the heat transferred minus the work done (first law of thermodynamics) the principle that no cyclic process is possible in which heat is absorbed from a reservoir at a single temperature and converted completely into mechanical work (second law of thermodynamics) and the principle that it is impossible to reduce the temperature of a system to absolute zero in a finite number of operations (third law of thermodynamics)
- light armored vehicle — an eight-wheeled armored reconnaissance car with a 25mm cannon, in service with the U.S. Army and Marine Corps in the 1980s.
- mechanical solidarity — social cohesiveness that is based on shared activities, beliefs, and experiences and is characteristic of simple traditional societies.
- modern apprenticeship — an arrangement that allows a school leaver to gain vocational qualifications while being trained in a job
- monochloroacetic acid — chloroacetic acid.
- mother-of-pearl cloud — nacreous cloud.
- mucopolysaccharidoses — Plural form of mucopolysaccharidosis.
- mucopolysaccharidosis — Any of a group of metabolic disorders caused by the absence or malfunction of lysosomal enzymes needed to break down glycosaminoglycans.
- munchausen's syndrome — a mental disorder in which a patient feigns illness to obtain hospital treatment
- near-death experience — A near-death experience is a strange experience that some people who have nearly died say they had when they were unconscious.
- old spanish practices — irregular practices among a group of workers to gain increased financial allowances, reduced working hours, etc
- ortho-phosphoric 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.
- orthophosphorous acid — a white to yellowish, crystalline, hygroscopic, water-soluble solid, H 3 PO 3 , used chiefly in the synthesis of phosphites.
- pathfinder prospectus — a prospectus regarding the flotation of a new company that contains only sufficient details to test the market reaction
- phenarsazine chloride — adamsite.
- philadelphia scrapple — a superior variety of scrapple made with pork shoulder and other cuts of pork rather than with pork scraps.
- pipelined burst cache — Pipeline Burst Cache
- privacy enhanced mail —
- programmed cell death — a normal, genetically regulated process leading to the death of cells and triggered by the presence or absence of certain stimuli, as DNA damage.
- psychopathic disorder — (in England, according to the Mental Health Act 1983) a persistent disorder or disability of mind which results in abnormally aggressive or seriously irresponsible conduct on the part of the person concerned
- purchasing department — the group of staff within an organization that is responsible for buying goods or products
- reading comprehension — a text that students use to help them improve their reading skills, by reading it and answering questions relating to the text. Sometimes used as a test or examination of reading skills. A reading comprehension can be in the student's own or another language
- record of achievement — a statement of the personal and educational development of each pupil
- red-headed woodpecker — a black and white North American woodpecker, Melanerpes erythrocephalus, having a red head and neck.
- richard coeur de lion — ("Richard the Lion-Hearted"; "Richard Coeur de Lion") 1157–99, king of England 1189–99.
- ring down the curtain — to lower the curtain at the end of a theatrical performance
- rutherford scattering — the scattering of an alpha particle through a large angle with respect to the original direction of motion of the particle, caused by an atom (Rutherford atom) with most of the mass and all of the positive electric charge concentrated at a center or nucleus.
- s-k reduction machine — An abstract machine defined by Professor David Turner to evaluate combinator expressions represented as binary graphs. Named after the two basic combinators, S and K.
- school of hard knocks — the experience gained from living, especially from disappointment and hard work, regarded as a means of education: The only school he ever attended was the school of hard knocks.
- scorched earth policy — a military practice of devastating the property and agriculture of an area before abandoning it to an advancing enemy.
- scorched-earth policy — a military practice of devastating the property and agriculture of an area before abandoning it to an advancing enemy.
- sheppard's correction — a method of correcting the bias in standard deviations and higher moments of distributions that arises from grouping values of the variable.