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18-letter words containing d, r

  • optical disc drive — optical disk drive
  • optical disk drive — (hardware)   (Or "optical disc drive", "optical storage") A generic term for any device that reads and/or writes optical media, i.e. compact discs, DVDs and/or Blu-ray discs or future media that uses light (from a small laser) to read data off a removable, rotating disk. At least one such drive is commonly installed in most personal computers to allow them to play and/or record audio and video media and load and store data such as program installers. The floppy disk has been replaced by optical media due to its vastly greater capacity, e.g. 50,000 megabytes for a dual-layer blu-ray disc compared with 1.5 megabytes for a floppy (over 30,000 times as much).
  • optical soundtrack — the final soundtrack on a motion picture, which appears as a band of black and white serrations along a strip of film to the left of the composite print. Light is shined through the serrations and is converted to audible sound.
  • order of australia — an order awarded to Australians for outstanding achievement or for service to Australia or to humanity at large; established in 1975
  • order of magnitude — You can use order of magnitude when you are giving an approximate idea of the amount or importance of something.
  • order room service — When a customer orders room service, they ask for meals or drinks to be brought to their room.
  • organic solidarity — social cohesiveness that is based on division of labor and interdependence and is characteristic of complex, industrial societies.
  • organized religion — institutionalized religion, usually with a hierarchical clergy and rules to govern the means by which adherents participate
  • oriental almandine — a variety of corundum resembling almandine in colour and used as a gemstone
  • orthopedic surgery — corrective operation on bones or joints
  • orthophthalic acid — Chemistry. any of three isomeric acids having the formula C 8 H 6 O 4 , especially the ortho isomer (orthophthalic acid) a colorless, crystalline, slightly water-soluble solid used chiefly in the manufacture of dyes, medicine, and perfume.
  • orthotungstic acid — an oxyacid acid of tungsten. Formula: H2WO4
  • osteitis deformans — Paget's disease.
  • osteoradionecrosis — bone tissue death induced by radiation.
  • over and done with — If you say that something is over and done with, you mean that it is completely finished and you do not have to think about it any more.
  • overdraft facility — a facility (of a bank or building-society cheque account) that allows a withdrawal of money in excess of the account's credit balance
  • overdraft interest — interest charged on money withdrawn in excess of the credit balance of a bank or building society account
  • overhead projector — over one's head; aloft; up in the air or sky, especially near the zenith: There was a cloud overhead.
  • overidentification — an act or instance of identifying; the state of being identified.
  • paediatric nursing — the branch of nursing concerned with the care of children
  • paint the town red — a substance composed of solid coloring matter suspended in a liquid medium and applied as a protective or decorative coating to various surfaces, or to canvas or other materials in producing a work of art.
  • palm beach gardens — a city in SE Florida, near North Palm Beach.
  • paper handkerchief — a handkerchief made from tissue paper
  • parallel reduction — A form of applicative order reduction in which all redexes in an expression are reduced simultaneously. Variants include parallel outermost reduction and lenient reduction. See normal order reduction.
  • parathyroid glands — any of several small oval glands usually lying near or embedded in the thyroid gland.
  • paraurethral gland — any of a group of vestigial glands located in the posterior wall of the urethra in women.
  • partial derivative — the derivative of a function with respect to one of its variables with all other variables held constant.
  • pass the hat round — to collect money, as for a cause
  • passing-out parade — a ceremonial parade of cadets who have completed their training
  • pci mezzanine card — (hardware)   (PMC) A family of low profile mezzanine cards for VMEbus, Futurebus+, desktop computers and other computer systems with logical and electrical layers based on the Peripheral Component Interconnect (PCI) specification. PMC is defined in IEEE P1386.1 and follows the Common Mezzanine Card (CMC) mechanical specification. PCI2.0 defines a 4.2 inch by 12.3 inch board that plugs perpendicularly into a mother board.
  • pectoral sandpiper — an American sandpiper, Calidris melanotos, the male of which, when courting, inflates its chest conspicuously.
  • pedal steel guitar — an oblong, floor-mounted electrified guitar, usually having ten strings, fretted with a steel bar and producing a wailing sound that is modulated by use of a foot pedal.
  • pedestrian traffic — the people coming and going on foot in a street, town, etc
  • people's democracy — (in Communist ideology) a country or form of government in transition from bourgeois democracy to socialism. In this stage there is more than one class, the largest being the proletariat, led by the Communist Party, which is therefore the dominant power
  • per ardua ad astra — through difficulties to the stars: the motto of the RAF
  • perceptual defence — the process by which it is thought that certain stimuli are either not perceived or are distorted due to their offensive, unpleasant, or threatening nature
  • percussion welding — a form of resistance welding in which the required pressure is provided by a hammerlike blow.
  • perforated tracery — tracery, as in early Gothic architecture, formed of cut or pierced slabs of stone set on edge with the flat side outward.
  • periodic inventory — Periodic inventory is a method of valuing inventory, usually at the end of accounting periods, by physically counting all merchandise held in stock at that time.
  • 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
  • permanent resident — an immigrant who has been given official residential status, often prior to being granted citizenship
  • perpetual calendar — a calendar devised to be used for many years, as in determining the day of the week on which a given date falls.
  • personal bodyguard — a person employed to protect a particular person
  • pescadores-islands — (used with a plural verb) Penghu.
  • peter and the wolf — a composition by Sergei Prokofiev written in 1936. It is a children's story with both music and text, spoken by a narrator accompanied by the orchestra
  • phantom withdrawal — the unauthorized removal of funds from a bank account using an automated teller machine
  • phosphatidylserine — any of a class of phospholipids occurring in biological membranes and fats
  • phthalic anhydride — a white, crystalline, slightly water-soluble solid, C 8 H 4 O 3 , used chiefly in the manufacture of dyes, alkyd resins, and plasticizers.
  • pierre d'iberville — Pierre le Moyne [pyer luh mwan] /pyɛr lə ˈmwan/ (Show IPA), Sieur, 1661–1706, French naval officer, born in Canada: founder of the first French settlement in Louisiana, 1699.
  • pileolated warbler — either of two western subspecies of Wilson's warbler.
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