19-letter words containing e, n, t, h, r, a
- go under the hammer — to be offered for sale by an auctioneer
- goldbach conjecture — an unproved theorem that every even integer greater than 2 can be written as the sum of two prime numbers.
- grandfather's chair — wing chair.
- grandfather's clock — a pendulum floor clock having a case as tall as or taller than a person; tall-case clock; long-case clock.
- grandmother's clock — a pendulum clock similar to a grandfather's clock but shorter.
- great idaean mother — Cybele.
- great wall of china — a system of fortified walls with a roadway along the top, constructed as a defense for China against the nomads of the regions that are now Mongolia and Manchuria: completed in the 3rd century b.c., but later repeatedly modified and rebuilt. 2000 miles (3220 km) long.
- great-grandchildren — a grandchild of one's son or daughter.
- great-granddaughter — a granddaughter of one's son or daughter.
- greenwich mean time — the time as measured on the prime meridian running through Greenwich, England: used in England and as a standard of calculation elsewhere.
- hairdryer treatment — (esp in sport) the practice of shouting at someone at close quarters in order to express one's displeasure at something he or she has done
- halt and catch fire — (humour, processor) (HCF) Any of several undocumented and semi-mythical machine instructions with destructive side-effects, supposedly included for test purposes on several well-known architectures going as far back as the IBM 360. The Motorola 6800 microprocessor was the first for which an HCF opcode became widely known. This instruction caused the processor to read every memory location sequentially until reset.
- 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.
- hang five (or ten) — to ride a surfboard with the toes of one (or both) feet draped over the front edge of the board
- haute vulgarisation — vulgarization, or popularization, on a higher level, esp. as done by academics, scholars, etc.
- have a nose for sth — If you say that someone has a nose for something, you mean that they have a natural ability to find it or recognize it.
- have an ax to grind — an instrument with a bladed head on a handle or helve, used for hewing, cleaving, chopping, etc.
- health professional — a person trained to work in any field of physical or mental health.
- heart in your mouth — If your heart is in your mouth, you feel very excited, worried, or frightened.
- heel-and-toe racing — race walking.
- henry david thoreau — Henry David, 1817–62, U.S. naturalist and author.
- henry the navigator — Prince, 1394–1460, prince of Portugal.
- hepatic portal vein — a vein connecting two capillary networks in the liver
- heptachlorobiphenyl — (organic compound) Either of twenty-four isomers of the polychlorinated biphenyl containing seven chlorine atoms.
- hermitian conjugate — adjoint (def 2).
- hexafluoroplatinate — (chemistry) The univalent anion PtF6- prepared by reacting platinum hexafluoride with certain metals or other elements.
- highways department — the department of a state, council, etc, responsible for the upkeep of roads and highways
- horizontal encoding — (processor) An instruction set where each field (a bit or group of bits) in an instruction word controls some functional unit or gate directly, as opposed to vertical encoding where instruction fields are decoded (by hard-wired logic or microcode) to produce the control signals. Horizontal encoding allows all possible combinations of control signals (and therefore operations) to be expressed as instructions whereas vertical encoding uses a shorter instruction word but can only encode those combinations of operations built into the decoding logic. An instruction set may use a mixture of horizontal and vertical encoding within each instruction. Because an architecture using horizontal encoding typically requires more instruction word bits it is sometimes known as a very long instruction word (VLIW) architecture.
- human rights abuses — acts that contravene human rights
- human rights record — the facts that are known about the tendency of a country, regime, etc, to observe and protect human rights
- huntington's chorea — a hereditary disease of the central nervous system characterized by brain deterioration and loss of control over voluntary movements, the symptoms usually appearing in the fourth decade of life.
- hydropneumatization — utilization of air pressure in the housing of a water turbine to keep the level of water that has been used from rising to interfere with the rotor blades.
- hydrostatic balance — a balance for finding the weight of an object submerged in water in order to determine the upthrust on it and thus determine its relative density
- hyper-nationalistic — a person devoted to nationalism.
- hyperbolic cosecant — a hyperbolic function that is the reciprocal of hyperbolic sine
- hyperfocal distance — the distance, at a given f number, between a camera lens and the nearest point (hyperfocal point) having satisfactory definition when focused at infinity.
- hypolipoproteinemia — An abnormally low level of lipoprotein in the blood.
- hysterosalpingogram — An X-ray image taken during hysterosalpingography.
- in the catbird seat — If you say that someone is in the catbird seat, you think that their situation is very good.
- in the driving seat — If you say that someone is in the driving seat, you mean that they are in control in a situation.
- in the tradition of — If you say that something or someone is in the tradition of a person or thing from the past, you mean that they have many features that remind you of that person or thing.
- in this/that regard — You can use in this regard or in that regard to refer back to something that you have just said.
- induction hardening — a process in which the outer surface of a metal component is rapidly heated by means of induced eddy currents. After rapid cooling the resulting phase transformations produce a hard wear-resistant skin
- industrial-strength — unusually strong, potent, or the like: heavy-duty: an industrial-strength soap.
- indwelling catheter — a hollow tube left implanted in a body canal or organ, especially the bladder, to promote drainage.
- inorganic chemistry — the branch of chemistry dealing with inorganic compounds.
- interchangeableness — Quality of being interchangeable.
- interface architect — An interface builder for Motif distributed by Hewlett-Packard (see UIMX).
- intermediate school — a school for pupils in grades 4 through 6.