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19-letter words containing an

  • gulf of tehuantepec — an inlet of the Pacific on the south coast of the Isthmus of Tehuantepec in S Mexico
  • 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
  • hang in the balance — to fasten or attach (a thing) so that it is supported only from above or at a point near its own top; suspend.
  • hang on the lips of — to listen to with close attention
  • hanging indentation — a style of text-setting in which the first line of a paragraph is set to the full measure and subsequent lines are indented at the left-hand side
  • have a few too many — If you say that someone has had a few too many or has had a few, you mean that they have drunk too many alcoholic drinks.
  • have an ax to grind — an instrument with a bladed head on a handle or helve, used for hewing, cleaving, chopping, etc.
  • haves and have-nots — If you refer to two groups of people as haves and have-nots, you mean that the first group are very wealthy and the second group are very poor. You can also refer generally to poor people as have-nots.
  • head-and-tail light — a small South American characin fish, Hemmigrammus ocellifer, having shiny red eyes and tail spots, often kept in aquariums.
  • heel-and-toe racing — race walking.
  • heinrich schliemann — Heinrich [hahyn-rikh] /ˈhaɪn rɪx/ (Show IPA), 1822–90, German archaeologist: excavated ancient cities of Troy and Mycenae.
  • hermitian conjugate — adjoint (def 2).
  • high-bush cranberry — cranberry bush
  • high-level language — a problem-oriented programming language, as COBOL, FORTRAN, or PL/1, that uses English-like statements and symbols to create sequences of computer instructions and identify memory locations, rather than the machine-specific individual instruction codes and numerical addresses employed by machine language.
  • highland clearances — in Scotland, the removal, often by force, of the people from some parts of the Highlands to make way for sheep, during the eighteenth and nineteenth centuries
  • hold up one's hands — to confess a mistake or misdeed
  • hop, skip, and jump — a short distance
  • hop, step, and jump — triple jump.
  • household insurance — an arrangement in which you pay money to a company, and they pay money to you if your household goods are stolen or damaged
  • huffing and puffing — empty threats or objections; bluster
  • 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
  • humanist technology — (philosophy)   Technology centered around the interests, needs, and well-being of humans.
  • 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
  • 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.
  • hypomixolydian mode — a plagal church mode represented on the white keys of a keyboard instrument by an ascending scale from D to D, with the final on G.
  • imperative language — (language)   Any programming language that specifies explicit manipulation of the state of the computer system, not to be confused with a procedural language, which specifies an explicit sequence of steps to perform. An example of an imperative (but non-procedural) language is a data manipulation language for a relational database management system. This specifies changes to the database but does not necessarily require anyone to specify a sequence of steps. Both contrast with declarative languages, which specify neither explicit state manipulation nor a sequence of steps.
  • in this day and age — these days
  • indemnity insurance — insurance covering against damage or loss
  • indian paint fungus — a common woody hoof-shaped fungus, Echinodontium tinctorium, found on conifers in western North America and believed to have been used as a dye by Pacific Northwest Indians.
  • inductive reactance — the opposition of inductance to alternating current, equal to the product of the angular frequency of the current times the self-inductance. Symbol: X L.
  • infantile paralysis — poliomyelitis.
  • inorganic chemistry — the branch of chemistry dealing with inorganic compounds.
  • instant photography — photography using an instant camera.
  • instantaneous speed — a scalar measure of the rate of movement of a body expressed as the rate of change of position with respect to time at a particular point. It is measured in metres per second, miles per hour, etc
  • intangible property — intellectual property, rights ownership
  • interchangeableness — Quality of being interchangeable.
  • interlaced scanning — a system of scanning a television picture, first along the even-numbered lines, then along the odd-numbered lines, in one complete scan
  • internal resistance — the resistance within a battery, or other voltage source, that causes a drop in the source voltage when there is a current.
  • internal translator — (language, mathematics)   (IT) An early compiler for mathematics developed by A.J. Perlis et al at Carnegie Tech ca 1957. IT was originally written for the Burroughs 205, then the IBM 650. IT was the forerunner of RUNCIBLE, GATE, CORRELATE and GAT. IT source code was converted to PIT, thence to SPIT. IT-2 produced machine language directly, IT-3 developed at Carnegie added double-precision floating-point.
  • interquartile range — the range of values of a frequency distribution between the first and third quartiles.
  • intracutaneous test — a test for immunity or allergy to a particular antigen by observing the local reaction following injection of a small amount of the antigen into the skin.
  • irish water spaniel — one of an Irish breed of large water spaniels having a thick, curly, liver-colored coat, a topknot of long, loose curls, and a thin, tapering tail covered with short hair.
  • islet of langerhans — any of several masses of endocrine cells in the pancreas that secrete insulin, somatostatin, and glucagon.
  • isthmus of san blas — the narrowest part of the Isthmus of Panama. Width: about 50 km (30 miles)
  • it stands to reason — it is logical
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