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19-letter words containing t, r, o, m

  • ferrite core memory — (storage)   (Or "core") An early form of non-volatile storage built (by hand) from tiny rings of magnetisable material threaded onto very fine wire to form large (e.g. 13"x13" or more) rectangluar arrays. Each core stored one bit of data. These were sandwiched between printed circuit boards(?). Sets of wires ran horizontally and vertically and where a vertical and horizontal wire crossed, a core had both wires threaded through it. A single core could be selected and magnetised by passing sufficient current through its horizontal and vertical wires. A core would retain its magnetisation until it was re-magnetised. The two possible polarities of magnetisation were used to represent the binary values zero and one. A third "sense" wire, passed through the core and, if the magnetisation of the core was changed, a small pulse would be induced in the sense wire which could be detected and used to deduce the core's original state. Some core memory was immersed in a bath of heated oil to improve its performance. Core memory was rendered obsolete by semiconductor memory. For example, the 1970s-era NCR 499 had two boards, each with 16 kilobytes of core memory.
  • first law of motion — any of three laws of classical mechanics, either the law that a body remains at rest or in motion with a constant velocity unless an external force acts on the body (first law of motion) the law that the sum of the forces acting on a body is equal to the product of the mass of the body and the acceleration produced by the forces, with motion in the direction of the resultant of the forces (second law of motion) or the law that for every force acting on a body, the body exerts a force having equal magnitude and the opposite direction along the same line of action as the original force (third law of motion or law of action and reaction)
  • first world problem — a fairly minor problem, frustrating situation, or complaint associated with a relatively high standard of living, as opposed to the more serious problems associated with poverty: I’m bored with all my electronic gadgets—such a first world problem!
  • fixed-rate mortgage — a home mortgage for which equal monthly payments of interest and principal are paid over the life of the loan, usually for a term of 30 years.
  • fixed-term contract — a contract for a particular and fixed period
  • flame-of-the-forest — a leguminous tree, Butea frondosa, native to E India and Myanmar, having hanging clusters of scarlet flowers
  • flannelmouth sucker — a sucker, Catostomus latipinnis, of the Colorado River and its tributaries.
  • flavor of the month — Informal. the subject of intense, usually temporary interest; the current fashion.
  • four colour theorem — four colour map theorem
  • fractal compression — (algorithm)   A technique for encoding images using fractals.
  • frameshift mutation — a mutation caused by frameshift.
  • framework agreement — an agreement that sets the limits and scope for further negotiation, discussion, etc
  • free-market economy — an economy based on the free market system
  • freedom of the city — nominal citizenship in a city, conferred as an honor upon important visitors.
  • freedom of the seas — the doctrine that ships of neutral countries may sail anywhere on the high seas without interference by warring powers.
  • freeze-frame button — a control button on a remote control device, used to stop a moving image to view it as a still
  • freezer compartment — in a refrigerator, an enclosed area kept at a temperature low enough to store frozen foods or freeze non-frozen foods
  • from pillar to post — an upright shaft or structure, of stone, brick, or other material, relatively slender in proportion to its height, and of any shape in section, used as a building support, or standing alone, as for a monument: Gothic pillars; a pillar to commemorate Columbus.
  • from rags to riches — a worthless piece of cloth, especially one that is torn or worn.
  • gamma ray astronomy — the branch of astronomy that deals with the study of celestial objects by means of the gamma rays that come from them.
  • gamma-ray astronomy — the branch of astronomy that deals with the study of celestial objects by means of the gamma rays that come from them.
  • gastrocolic omentum — the peritoneal fold attached to the stomach and the colon and hanging over the small intestine.
  • general of the army — the highest ranking military officer; the next rank above general.
  • genetic programming — (programming)   (GP) A programming technique which extends the genetic algorithm to the domain of whole computer programs. In GP, populations of programs are genetically bred to solve problems. Genetic programming can solve problems of system identification, classification, control, robotics, optimisation, game playing, and pattern recognition. Starting with a primordial ooze of hundreds or thousands of randomly created programs composed of functions and terminals appropriate to the problem, the population is progressively evolved over a series of generations by applying the operations of Darwinian fitness proportionate reproduction and crossover (sexual recombination).
  • geneva nomenclature — an internationally accepted system for naming organic carbon compounds.
  • gentleman-pensioner — (formerly) a gentleman-at-arms.
  • geomagnetic equator — an imaginary line on the earth's surface, the plane of which passes through the center and is midway between the geomagnetic poles.
  • geometric isomerism — each of two or more chemical compounds having the same molecular formula but a different geometric arrangement; an unsaturated compound or ring compound in which rotation around a carbon bond is restricted, as in cis- and trans- configurations.
  • geothermal gradient — the increase in temperature with increasing depth within the earth.
  • giant silkworm moth — any silkworm moth of the family Saturniidae.
  • glottalic airstream — a current of air in the pharynx produced by the action of the glottis.
  • go on a/the rampage — If people go on a rampage, they rush around in a wild or violent way, causing damage or destruction.
  • go under the hammer — to be offered for sale by an auctioneer
  • golden lion tamarin — a monkey, Leontopithecus rosalia rosalia, of tropical rain forests of southeastern Brazil, having a silky golden coat and a long golden mane: threatened with extinction.
  • government monopoly — the exclusive control of the market supply of a product or service by the government
  • government-in-exile — a government temporarily moved to or formed in a foreign land by exiles who hope to establish that government in their native country after its liberation.
  • grandmother's clock — a pendulum clock similar to a grandfather's clock but shorter.
  • great idaean mother — Cybele.
  • green mountain boys — the members of the armed bands of Vermont organized in 1770 to oppose New York's territorial claims. Under Ethan Allen they won fame in the War of American Independence
  • grievance committee — a group of representatives chosen from a labor union or from both labor and management to consider and remedy workers' grievances.
  • gross profit margin — A gross profit margin is a measure of the profitability of a company, that is calculated by dividing gross profit by net sales.
  • grosse pointe farms — a city in SE Michigan, near Detroit.
  • hamiltonian problem — (computability)   (Or "Hamilton's problem") A problem in graph theory posed by William Hamilton: given a graph, is there a path through the graph which visits each vertex precisely once (a "Hamiltonian path")? Is there a Hamiltonian path which ends up where it started (a "Hamiltonian cycle" or "Hamiltonian tour")? Hamilton's problem is NP-complete. It has numerous applications, sometimes completely unexpected, in computing.
  • handlebar moustache — a man's moustache having long, curved ends that resemble the handlebars of a bicycle.
  • harmonic distortion — distortion caused by nonlinear characteristics of electronic apparatus, esp of audio amplifiers, that generate unwanted harmonics of the input frequencies
  • have a problem with — to be unable to understand or do
  • heart in your mouth — If your heart is in your mouth, you feel very excited, worried, or frightened.
  • heine-borel theorem — the theorem that in a metric space every covering consisting of open sets that covers a closed and compact set has a finite collection of subsets that covers the given set.
  • hepatoportal system — a vascular arrangement in vertebrates through which blood is transported into the liver from capillaries of the stomach, spleen, duodenum, pancreas, and intestines.
  • hermitian conjugate — adjoint (def 2).
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