15-letter words containing r, a, c, h
- graph reduction — A technique invented by Chris Wadsworth where an expression is represented as a directed graph (usually drawn as an inverted tree). Each node represents a function call and its subtrees represent the arguments to that function. Subtrees are replaced by the expansion or value of the expression they represent. This is repeated until the tree has been reduced to a value with no more function calls (a normal form). In contrast to string reduction, graph reduction has the advantage that common subexpressions are represented as pointers to a single instance of the expression which is only reduced once. It is the most commonly used technique for implementing lazy evaluation.
- graphic display — the way in which line drawings and text are displayed
- graphic granite — a pegmatite that has crystals of gray quartz imbedded in white or pink microcline in such a manner that they resemble cuneiform writing.
- graphologically — In terms of or by means of graphology.
- graveyard watch — graveyard shift.
- greenham common — a village in West Berkshire unitary authority, Berkshire; site of a US cruise missile base, and, from 1981, a camp of women protesters against nuclear weapons; although the base had closed by 1991 a small number of women remained until 2000
- gregorian chant — the plain song or cantus firmus used in the ritual of the Roman Catholic Church.
- gynandromorphic — (of an organism) Having male and female characteristics.
- hacking x for y — [ITS] Ritual phrasing of part of the information which ITS made publicly available about each user. This information (the INQUIR record) was a sort of form in which the user could fill out various fields. On display, two of these fields were always combined into a project description of the form "Hacking X for Y" (e.g. ""Hacking perceptrons for Minsky""). This form of description became traditional and has since been carried over to other systems with more general facilities for self-advertisement (such as Unix plan files).
- haematachometer — (dated) An apparatus for measuring the velocity of the blood.
- haemoglobinuric — relating to the presence of haemoglobin in the urine
- hair specialist — an expert in the treatment and care of human hair
- hanging glacier — a glacier situated on a shelf above a valley or another glacier; it may be joined to the lower level by an icefall or separate from it
- hard mint candy — a hardened mint-flavoured sweet
- hard-luck story — a story of misfortune designed to elicit sympathy
- hard-shell clam — quahog.
- hard-shell crab — a crab, especially an edible crab, that has not recently molted and has a hard shell.
- hardship clause — a clause in a contract which covers unforeseen events that would make it more difficult for one party to complete the contract, and in which case offers alternative terms
- harmonic motion — periodic motion consisting of one or more vibratory motions that are symmetric about a region of equilibrium, as the motion of a vibrating string of a musical instrument.
- harmonic series — a series in which the reciprocals of the terms form an arithmetic progression.
- hausdorff space — a topological space in which each pair of points can be separated by two disjoint open sets containing the points.
- have a crush on — be attracted to: sb
- haversian canal — a microscopic channel in bone, through which a blood vessel runs.
- hay conditioner — either of two machines, one designed to crush stems of hay, the other to break and bend them, in order to cause more rapid and even drying
- heart condition — cardiac disorder
- heart-searching — a thorough examination of one's feelings and motives; a self-examination of one's conscience.
- heart's content — Anatomy. a hollow, pumplike organ of blood circulation, composed mainly of rhythmically contractile smooth muscle, located in the chest between the lungs and slightly to the left and consisting of four chambers: a right atrium that receives blood returning from the body via the superior and inferior vena cavae, a right ventricle that pumps the blood through the pulmonary artery to the lungs for oxygenation, a left atrium that receives the oxygenated blood via the pulmonary veins and passes it through the mitral valve, and a left ventricle that pumps the oxygenated blood, via the aorta, throughout the body.
- hebrew calendar — the lunisolar calendar used by Jews, as for determining religious holidays, that is reckoned from 3761 b.c. and was established by Hillel II in the 4th century a.d., the calendar year consisting of 353 days (defective year) 354 days (regular year) or 355 days (perfect year or abundant year) and containing 12 months: Tishri, Heshvan, Kislev, Tevet, Shevat, Adar, Nisan, Iyar, Sivan, Tammuz, Av, and Elul, with the 29-day intercalary month of Adar Sheni added after Adar seven times in every 19-year cycle in order to adjust the calendar to the solar cycle. The Jewish ecclesiastical year begins with Nisan and the civil year with Tishri.
- heliacal rising — rising of a celestial object at approximately the same time as the rising of the sun
- heliometrically — By means of, or in terms of, heliometry.
- hemangiosarcoma — A fast-growing, highly invasive variety of cancer, a sarcoma arising from the lining of blood vessels, occurring almost exclusively in dogs and rarely in cats.
- hemicraniectomy — (surgery) The surgical removal of half of the cranium to enable brain surgery; hemicraniotomy.
- hemochromatosis — a rare metabolic disorder characterized by a bronzed skin, cirrhosis, and severe diabetes, caused by the deposit in tissue, especially of the liver and pancreas, of hemosiderin and other pigments containing iron.
- henry cavendish — Henry, 1731–1810, English chemist and physicist.
- hepatocarcinoma — (pathology) cancer of the liver.
- heralds' office — the official heraldic authority of Scotland.
- herbal medicine — the use of herbs to treat illness
- heritage centre — a museum that houses exhibits describing the culture and history of a particular place and its inhabitants
- hermeneutically — of or relating to hermeneutics; interpretative; explanatory.
- hernando cortes — Hernando [er-nahn-daw] /ɛrˈnɑn dɔ/ (Show IPA), Hernán [er-nahn] /ɛrˈnɑn/ (Show IPA), 1485–1547, Spanish conqueror of Mexico.
- hernando cortez — Hernando [er-nahn-daw] /ɛrˈnɑn dɔ/ (Show IPA), Hernán [er-nahn] /ɛrˈnɑn/ (Show IPA), 1485–1547, Spanish conqueror of Mexico.
- heterocercality — the condition or state of having a heterocercal tail
- heterochromatic — of, having, or pertaining to more than one color.
- heterochromatin — the dense, highly stainable part of a chromosome.
- heterodactylous — having the first and fourth toes directed backward, and the second and third forward, as in trogons.
- heteroscedastic — (of several distributions) having different variances
- heterotolerance — (immunology) Subsequent unresponsiveness to a different agonist.
- hewlett-packard — (HP) Hewlett-Packard designs, manufactures and services electronic products and systems for measurement, computation and communications. The company's products and services are used in industry, business, engineering, science, medicine and education in approximately 110 countries. HP was founded in 1939 and employs 96600 people, 58900 in the USA. They have manufacturing and R&D establishments in 54 cities in 16 countries and approximately 600 sales and service offices in 110 countries. Their revenue (in 1992/1993?) was $20.3 billion. The Chief Executive Officer is Lewis E. Platt. HP's stock is traded on the New York Stock Exchange and the Pacific, Tokyo, London, Frankfurt, Zurich and Paris exchanges. Quarterly sales $6053M, profits $347M (Aug 1994).
- hexachlorophene — a white, crystalline powder, C 13 Cl 6 H 6 O 2 , insoluble in water: used as an antibacterial agent chiefly in toothpastes and soaps.
- hibernicization — the process or act of making Irish