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18-letter words containing a, s, h, t, n

  • open-heart surgery — surgery performed on the exposed heart while a heart-lung machine pumps and oxygenates the blood and diverts it from the heart.
  • oriental shorthair — any of a breed of domestic cat, similar to the Siamese but with greenish eyes and often a coat of a solid color
  • orthotungstic acid — an oxyacid acid of tungsten. Formula: H2WO4
  • out of one's hands — no longer one's responsibility
  • packet switch node — (PSN) A dedicated computer whose purpose is to accept, route and forward packets in a packet-switched network.
  • parathyroid glands — any of several small oval glands usually lying near or embedded in the thyroid gland.
  • pass the hat round — to collect money, as for a cause
  • passive euthanasia — a form of euthanasia in which medical treatment that will keep a dying patient alive for a time is withdrawn
  • pathname separator — (file system)   The character used to separate elements of a path or pathname. Under Unix and POSIX.1 compliant systems the pathname separator is the (forward) slash, in MS-DOS backslash serves the same purpose. For obvious reasons the no directory or file name can contain this character.
  • patron of the arts — someone who acts as a patron to or supports charities, organizations, and individuals that work in or concern the arts
  • pennsylvania dutch — the descendants of 17th- and 18th-century settlers in Pennsylvania from southwest Germany and Switzerland.
  • permanent hardness — hardness of water that cannot be removed by boiling as it results mainly from the presence of calcium and magnesium chlorides and sulphates
  • phanerocrystalline — (of a rock) having the principal constituents in the form of crystals visible to the naked eye.
  • phantasmagorically — having a fantastic or deceptive appearance, as something in a dream or created by the imagination.
  • phase-shift keying — (communications)   (PSK) A digital modulation scheme that conveys data by changing the phase of a carrier wave. The data can either determine the absolute phase relative to the unmodulated carrier or reference signal ("coherent phase-shift keying", CPSK) or the change in phase ("differential phase-shift keying", DPSK). The number of different phases used determines the amount of data that can be transmitted in each cycle. Each cycle can be considered to constitute one "symbol", e.g. with two possible phases, each cycle carries one bit. The more phases that are used, the less tollerant to noise the transmissions becomes. Alternatives to PSK are amplitude-shift keying (ASK) and frequency-shift keying (FSK).
  • phosphatidylserine — any of a class of phospholipids occurring in biological membranes and fats
  • photoisomerization — isomerization induced by light.
  • photosensitization — to make (a material) photosensitive, as by the application of a photosensitive emulsion.
  • physical education — systematic instruction in sports, exercises, and hygiene given as part of a school or college program.
  • physical inventory — To carry out a physical inventory is to count all the stock on hand.
  • pitch-and-run shot — chip shot.
  • plumber's merchant — a shop or business that sells things needed for the job of installing and repairing pipes, fixtures, etc, for water, drainage, and gas
  • policeman's helmet — a Himalayan balsaminaceous plant, Impatiens glandulifera, with large purplish-pink flowers, introduced into Britain
  • prison authorities — the people in charge of running a prison
  • processionary moth — a moth of the family Thaumetopoeidae, esp the oak processionary moth (Thaumetopoea processionea), the larvae of which leave the communal shelter nightly for food in a V-shaped procession
  • protease inhibitor — a drug that inhibits the action of protease, especially any of a class of antiviral drugs that prevent the cleavage and replication of HIV proteins.
  • provision merchant — a person or company in the business of retailing food and other provisions
  • pseudo-anarchistic — a person who advocates or believes in anarchy or anarchism.
  • psychogalvanometer — a type of galvanometer for detecting and measuring psychogalvanic currents.
  • punishment beating — a form of corporal punishment carried out by a paramilitary organization on a member of another sectarian organization, usually in Northern Ireland
  • pyramus and thisbe — (in Greek legend) two lovers of Babylon: Pyramus, wrongly supposing Thisbe to be dead, killed himself and she, encountering him in his death throes, did the same
  • repayment schedule — a document detailing the specific terms of a borrower's loan, such as monthly payment, interest rate, due dates etc
  • research assistant — a graduate who is employed on a temporary or part-time basis to assist the university with academic research
  • research scientist — someone who conducts scientific research or investigation, in order to discover new things, etc
  • research-intensive — focusing financial and other resources on research and development as opposed to capital and labor; noting or pertaining to a high ratio of expenditure on research in relation to the value of net output.
  • residential school — (in Canada) a boarding school maintained by the Canadian government for Indian and Inuit children from sparsely populated settlements
  • resistance fighter — someone who fights (for freedom, etc) against an invader in an occupied country, or against their government, etc, often secretly or illegally
  • reverse angle shot — Movies. reverse shot.
  • rhode island white — one of a dual-purpose American breed of chickens having white feathers and a rose comb.
  • rotary clothesline — an apparatus of radiating spokes that support lines on which clothes are hung to dry
  • saint john's bread — carob (def 2).
  • saint peter's fish — another name for tilapia, taken from a Bible story about Saint Peter catching a fish with a coin in its mouth
  • saskatchewan party — (in Canada) a Saskatchewan political party formed by former members of the provincial Progressive Conservative and Liberal Parties
  • say/kiss goodnight — If you say goodnight to someone or kiss them goodnight, you say something such as 'Goodnight' to them or kiss them before one of you goes home or goes to sleep.
  • schengen agreement — an agreement, signed in 1985 at a meeting of European leaders near Schengen, Luxembourg, but not implemented until 1995, to gradually abolish border controls within Europe; it was supplemented in 1990 by the Schengen Convention; in 1999 the agreement was incorporated into European Union law. Twenty-six countries acceded by 2015; the UK is not a signatory
  • schwarz inequality — Also called Cauchy's inequality. the theorem that the inner product of two vectors is less than or equal to the product of the magnitudes of the vectors.
  • scratch one's head — If you say that someone is scratching their head, you mean that they are thinking hard and trying to solve a problem or puzzle.
  • seagate technology — (company)   A major manufacturer of hard disk drives, founded in 1979 as "Shugart Technology" by Alan F. Shugart and Finis Conner. That name is on the original patents for the 5.25" hard disk drive. They changed the name to Seagate Technology soon after to avoid confusion, and also to avoid friction with Xerox, which had since purchased Alan's earlier company, Shugart Associates. Address: 920 Disc Drive, Scotts Valley, CA 95066, USA. Fax: +1 (408) 438 3320.
  • search-and-destroy — designed to find and destroy by bombing etc
  • segmental phonemes — phonemes consisting of sound segments; hence, the vowel, consonant, and semivowel sounds of a language
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