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21-letter words containing a, c, h, y

  • ilya ilyich mechnikov — Élie [French ey-lee] /French eɪˈli/ (Show IPA), (Ilya Ilyich Mechnikov) 1845–1916, Russian zoologist and bacteriologist in France: Nobel Prize in medicine 1908.
  • immunohistochemically — By means of or in regard to immunohistochemistry.
  • 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.
  • insulin shock therapy — a former treatment for mental illness, especially schizophrenia, employing insulin-induced hypoglycemia as a method for producing convulsive seizures.
  • irish republican army — an underground Irish nationalist organization founded to work for Irish independence from Great Britain: declared illegal by the Irish government in 1936, but continues activity aimed at the unification of the Republic of Ireland and Northern Ireland. Abbreviation: IRA, I.R.A.
  • korsakoff's psychosis — a mental illness involving severe confusion and inability to retain recent memories, usually caused by alcoholism
  • laboratory technician — sb who assists in a laboratory
  • 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
  • lady of the camellias — French La Dame aux Camélias. a novel (1848) and play (1852) by Alexandre Dumas fils.
  • 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)
  • macintosh file system — (file system)   A file on the Macintosh consists of two parts, called forks. The "data fork" contains the data which would normally be stored in the file on other operating systems. The "resource fork" contains a collection of arbitrary attribute/value pairs, including program segments, icon bitmaps, and parametric values. Yet more information regarding Macintosh files is stored by the Finder in a hidden file, called the "Desktop Database". Because of the complications in storing different parts of a Macintosh file in non-Macintosh file systems that only handle consecutive data in one part, it is common to only send the Data fork or to convert the Macintosh file into some other format before transferring it.
  • mechanical metallurgy — the branch of metallurgy dealing with the response of metals to applied forces.
  • mechanical solidarity — social cohesiveness that is based on shared activities, beliefs, and experiences and is characteristic of simple traditional societies.
  • 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.
  • multichannel analyser — an electronic instrument, such as a pulse height analyser, that splits an input waveform into a large number of channels in accordance with a particular parameter of the input
  • munchausen's syndrome — a mental disorder in which a patient feigns illness to obtain hospital treatment
  • north atlantic treaty — the treaty (1949) signed by 12 countries, providing for the establishment of NATO.
  • one-way hash function — (algorithm)   (Or "message digest function") A one-way function which takes a variable-length message and produces a fixed-length hash. Given the hash it is computationally infeasible to find a message with that hash; in fact one can't determine any usable information about a message with that hash, not even a single bit. For some one-way hash functions it's also computationally impossible to determine two messages which produce the same hash. A one-way hash function can be private or public, just like an encryption function. MD5, SHA and Snefru are examples of public one-way hash functions. A public one-way hash function can be used to speed up a public-key digital signature system. Rather than sign a long message, which can take a long time, compute the one-way hash of the message, and sign the hash.
  • open graphics library — (graphics, library)   (OpenGL) A multi-platform software interface to graphics hardware, supporting rendering and imaging operations. The OpenGL interface was developed by Silicon Graphics, who license it to other vendors. The OpenGL graphics interface consists of several hundred functions operating on 2D and 3D objects, supporting basic techniques, such as modelling and smooth shading, and advanced techniques, such as texture mapping and motion blur. Many operations require a frame buffer. OpenGL is network-transparent, and a common extension to the X Window System allows an OpenGL client to communicate across a network with a different vendor's OpenGL server. OpenGL is based on Silicon Graphics' proprietary IRIS GL.
  • orthogonal trajectory — the locus of a point whose path cuts each curve of a family of curves at right angles.
  • pacific daylight time — the version of Pacific Standard Time that is in use when daylight saving time is being observed
  • physical anthropology — the branch of anthropology dealing with the evolutionary changes in human anatomy and physiology, using mensurational and descriptive techniques.
  • physically challenged — See example at challenged (def 1).
  • physician's assistant — a person trained to perform under the supervision of a physician many clinical procedures traditionally performed by a physician, as diagnosing and treating minor ailments. Abbreviation: PA.
  • play with a full deck — Nautical. a floorlike surface wholly or partially occupying one level of a hull, superstructure, or deckhouse, generally cambered, and often serving as a member for strengthening the structure of a vessel. the space between such a surface and the next such surface above: Our stateroom was on B deck.
  • pneumoencephalography — encephalography.
  • polygenic inheritance — the heredity of complex characters that are determined by a large number of genes, each one usually having a relatively small effect.
  • potassium thiocyanate — a colorless, crystalline, hygroscopic, water-soluble solid, KSCN, used chiefly in the manufacture of chemicals, dyes, and drugs.
  • primary sex character — any of the body structures directly concerned in reproduction, as the testes, ovaries, and external genitalia.
  • privacy enhanced mail —
  • psychological primary — one of a set of perceived colours (red, yellow, blue, green, black, and white) that can be used to characterize all other perceived colours
  • psychological warfare — the use of propaganda, threats, and other psychological techniques to mislead, intimidate, demoralize, or otherwise influence the thinking or behavior of an opponent.
  • psychomotor agitation — agitation (def 3).
  • psychomotor-agitation — the act or process of agitating; state of being agitated: She left in great agitation.
  • 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
  • psychopharmacotherapy — the use of psychoactive drugs in the symptomatic treatment or control of mental disorders or psychiatric disease.
  • rectangular hyperbola — a hyperbola with perpendicular asymptotes
  • reinforcement therapy — a behavior modification technique in which appropriate behavior is strengthened through systematic reinforcement.
  • saint anthony's cross — tau cross.
  • schlieren photography — a type of photography which records schlieren
  • scholastic philosophy — the system of philosophy, theology, and teaching that dominated medieval western Europe and was based on the writings of the Church Fathers and (from the 12th century) Aristotle, the Greek philosopher (384–322 bc)
  • 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.
  • strachey, christopher — Christopher Strachey
  • structural psychology — psychology centering on the analysis of the structure or content of conscious mental states by introspective methods.
  • sunday school teacher — someone who teaches at a Sunday school
  • sympathetic vibration — a vibration induced by resonance.
  • synchrotron radiation — electromagnetic radiation emitted by charged particles as they pass through magnetic fields.
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