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17-letter words containing a, c, r, d

  • green peach aphid — an aphid, Myzus persicae, that is a pest of many fruit trees, ornamentals, and vegetables and a vector of certain viral plant diseases.
  • greenland current — the ocean current flowing clockwise around S Greenland.
  • greensand process — a process for casting iron with sand not previously heated.
  • grey-faced petrel — a dark-coloured New Zealand petrel, Pterodroma macroptera gouldi
  • grid merchandiser — A grid merchandiser is a lightweight, free-standing, flexible fixture made up of moveable grids of wire and used by retailers can display large volumes of merchandise in a small space.
  • grignard reaction — the reaction of a Grignard reagent with any of the numerous types of compounds with which it can combine, as alcohols, acids, aldehydes, ketones, or esters: used chiefly in organic synthesis.
  • grooved fricative — a fricative, as (s), in which air is channeled through a groove along the center of the tongue.
  • haemorrhoidectomy — surgical removal of haemorrhoids
  • half-round chisel — a cold chisel with a semicircular cutting edge used for making narrow channels
  • hall of residence — Halls of residence are buildings with rooms or flats, usually built by universities or colleges, in which students live during the term.
  • hammer and sickle — the emblem of the Soviet Union, adopted in 1923 and consisting of an insignia of a hammer with its handle across the blade of a sickle and a star above.
  • hammered dulcimer — dulcimer (sense 1)
  • handicap register — a list of the disabled people in its area that a local authority had a duty to compile under the Chronically Sick and Disabled Persons Act 1970
  • hard nut to crack — a dry fruit consisting of an edible kernel or meat enclosed in a woody or leathery shell.
  • hard rock geology — (loosely) of or relating to igneous or metamorphic rocks, as in mining (hard-rock mining) and geology (hard-rock geology)
  • hard-shelled clam — quahog
  • hard-shelled crab — a crab, esp. an edible sea crab, before it has shed its hard shell
  • haroun-al-raschid — Harun al-Rashid.
  • henry cabot lodge — Henry Cabot, 1850–1924, U.S. public servant and author: senator 1893–1924.
  • herbaceous border — A herbaceous border is a flower bed containing a mixture of plants that flower every year.
  • heterochlamydeous — (of a plant) having a perianth consisting of distinct sepals and petals
  • historical method — the process of establishing general facts and principles through attention to chronology and to the evolution or historical course of what is being studied.
  • homeland security — national defence
  • horseradish sauce — a piquant sauce made from horseradish root, vinegar, etc, and traditionally eaten in Britain with roast beef
  • household cavalry — (in Britain) cavalry units forming part of the ceremonial guard of the monarch.
  • humpbacked bridge — A humpbacked bridge or humpback bridge is a short and very curved bridge with a shape similar to a semi-circle.
  • hybrid fiber coax — (networking)   (HFC) A kind of physical connection used in networks for audio, video, and data. DVB (Digital Video Broadcast) is used in Europe and DOCSIS is used in N America.
  • hydraulic circuit — a circuit through which water or another liquid, instead of electric current, flows, but which otherwise operates in the same way as an electric circuit
  • hydrochloric acid — a colorless or faintly yellow, corrosive, fuming liquid, HCl, used chiefly in chemical and industrial processes.
  • hydroelectrically — Using hydroelectric power.
  • hydrofluoric acid — a colorless, fuming, corrosive liquid, HF, an aqueous solution of hydrogen fluoride, used chiefly for etching glass.
  • hydrofluorocarbon — Any of a class of partly chlorinated and fluorinated hydrocarbons, used as an alternative to chlorofluorocarbons in foam production, refrigeration, and other processes.
  • hydrogasification — a high-temperature, high-pressure process for producing liquid or gaseous fuels from fine particles of coal and hydrogen gas
  • hydrotherapeutics — hydrotherapy.
  • hypochlorous acid — a weak, unstable acid, HOCl, existing only in solution and in the form of its salts, used as a bleaching agent and disinfectant.
  • hypochondriacally — In a hypochondriacal manner.
  • icosidodecahedron — A semiregular polyhedron with twelve faces that are regular pentagons and twenty that are equilateral triangles.
  • icositetrahedrons — Plural form of icositetrahedron.
  • ideogrammatically — In terms of, or by means of, ideograms.
  • idiosyncratically — pertaining to the nature of idiosyncrasy, or something peculiar to an individual: The best minds are idiosyncratic and unpredictable as they follow the course of scientific discovery.
  • illegal procedure — a penalty assessed against the offensive team for a technical rules violation, as in assuming an illegal formation.
  • in the background — behind the focus of attention
  • incendiary device — a bomb that is designed to start fires
  • inconsiderateness — without due regard for the rights or feelings of others: It was inconsiderate of him to keep us waiting.
  • incubation period — the period between infection and the appearance of signs of a disease.
  • indecipherability — Quality of being indecipherable.
  • indescribableness — The quality of being indescribable.
  • indian rope-trick — the supposed Indian feat of climbing an unsupported rope
  • indicator diagram — a graphical or other representation of the cyclic variations of pressure and volume within the cylinder of a reciprocating engine obtained by using an indicator
  • indicator species — See at indicator (def 6).
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