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18-letter words containing h, o, r, t

  • 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.
  • optical brightener — an additive that dyes and brightens fabric or paper
  • organization chart — a diagrammatic representation showing how departments or divisions in an organization, as a large corporation, are related to one another along lines of authority.
  • oriental cockroach — a dark-brown cockroach, Blatta orientalis, thought to have originated in Asia but now nearly cosmopolitan in distribution.
  • 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
  • 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
  • out of the running — the act of a person, animal, or thing that runs.
  • outer automorphism — an automorphism that is not an inner automorphism.
  • outreach programme — a programme designed to help and encourage disadvantaged members of the community
  • ovariohysterectomy — Surgical removal of the ovaries and uterus.
  • 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.
  • over the long term — in the future
  • overhead projector — over one's head; aloft; up in the air or sky, especially near the zenith: There was a cloud overhead.
  • overnight telegram — a type of domestic telegram sent at a reduced rate with a minimum charge for 10 words or less and accepted until midnight for delivery the following day.
  • 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.
  • palaeoanthropology — the branch of anthropology concerned with primitive man
  • par for the course — an equality in value or standing; a level of equality: The gains and the losses are on a par.
  • 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
  • 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
  • pave the way (for) — to prepare the way (for); facilitate the introduction (of)
  • peppermint camphor — menthol.
  • perish the thought — to die or be destroyed through violence, privation, etc.: to perish in an earthquake.
  • 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
  • peter tschaikowsky — Peter Ilyich [il-yich] /ˈɪl yɪtʃ/ (Show IPA), Tchaikovsky, Peter Ilyich.
  • 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.
  • phantom withdrawal — the unauthorized removal of funds from a bank account using an automated teller machine
  • philharmonic pitch — a standard of pitch in which A above middle C is established at 440 vibrations per second.
  • phosphatidylserine — any of a class of phospholipids occurring in biological membranes and fats
  • photoelectric cell — photocell.
  • photoisomerization — isomerization induced by light.
  • photomorphogenesis — plant development that is controlled by light.
  • physical inventory — To carry out a physical inventory is to count all the stock on hand.
  • pick of the litter — objects strewn or scattered about; scattered rubbish.
  • pitch-and-run shot — chip shot.
  • planned parenthood — an organization that gives out information on the planning of the number and spacing of the births of one's children, as through the use of birth-control measures
  • plight one's troth — to make a promise of marriage
  • pollen mother cell — one of the mother cells that produce four microspores by meiosis.
  • polychromatophilic — having an affinity for more than one kind of stain, especially for acid, neutral, and basic stains, as polychromatophilic erythroblasts characteristic of pernicious anemia.
  • porter-house steak — Also called porterhouse steak. a choice cut of beef from between the prime ribs and the sirloin.
  • positively charged — having a positive charge
  • potassium chlorate — a white or colorless, crystalline, water-soluble, poisonous solid, KClO 3 , used chiefly as an oxidizing agent in the manufacture of explosives, fireworks, matches, bleaches, and disinfectants.
  • potassium chloride — a white or colorless, crystalline, water-soluble solid, KCl, used chiefly in the manufacture of fertilizers and mineral water, and as a source of other potassium compounds.
  • preparatory school — a private or parochial secondary school, especially one boarding its students and providing a college-preparatory education.
  • prepare the ground — make conditions ready
  • press photographer — a photographer who works for a newspaper, magazine, etc
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