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13-letter words containing a, t, o, p

  • oilspot glaze — a brown or black ceramic glaze dotted with silvery spots caused by impurities.
  • omoplatoscopy — Divination by use of a shoulder blade.
  • on a par with — If you say that two people or things are on a par with each other, you mean that they are equally good or bad, or equally important.
  • on one's part — a portion or division of a whole that is separate or distinct; piece, fragment, fraction, or section; constituent: the rear part of the house; to glue the two parts together.
  • on the carpet — a heavy fabric, commonly of wool or nylon, for covering floors.
  • on the parish — receiving parochial relief
  • onomatopoeial — (obsolete, rare) Of or pertaining to onomatopoeia.
  • onomatopoeias — Plural form of onomatopoeia.
  • onomatopoetic — the formation of a word, as cuckoo, meow, honk, or boom, by imitation of a sound made by or associated with its referent.
  • onychophagist — the practice of biting one's nails, especially when done habitually and as a symptom of emotional disturbance.
  • opacification — to cause to become opaque.
  • open a bottle — If you open a bottle, you remove the cork or cap.
  • open adoption — an arrangement in which contact is maintained or allowed between a child's adoptive and biological parents.
  • open and shut — immediately obvious upon consideration; easily decided: an open-and-shut case of murder.
  • open fracture — compound fracture.
  • open interval — (mathematics)   A type of interval (range of numbers) that does not include either of its endpoints. For example, when mixing red and blue paint, the proportion of red lies in the interval 0% to 100% but can't be exactly 0% or 100% or it wouldn't be a mixture.
  • open-and-shut — immediately obvious upon consideration; easily decided: an open-and-shut case of murder.
  • open-standard — (of computer programs, codes, etc) freely available to all users
  • openheartedly — Alt form open-heartedly.
  • opentransport — (networking)   (OT) A complete reimplementation of all levels of the Macintosh networking code including "Classic" AppleTalk and MacTCP. It appeared in MacOS revision 7.5.3 [or earlier? Date?].
  • operationally — able to function or be used; functional: How soon will the new factory be operational?
  • operativeness — (uncountable) The state or quality of being operative.
  • ophthalmology — the branch of medical science dealing with the anatomy, functions, and diseases of the eye.
  • opinionatedly — In an opinionated manner.
  • opisthobranch — any gastropod mollusk of the order Opisthobranchia, as the sea slugs, sea butterflies, and sea hares, characterized by a vestigial or absent mantle and shell and two pairs of tentacles.
  • opisthography — the practice of writing on the front and back of a parchment or papyrus
  • oppignoration — the act or an instance of pawning or pledging
  • oppositionary — the action of opposing, resisting, or combating.
  • oprahfication — the perceived increase in people’s desire to discuss their emotions or personal problems, attributed to the influence of confessional television programmes
  • opthalmoscope — Misspelling of ophthalmoscope.
  • optic chiasma — a site at the base of the forebrain where the inner half of the fibers of the left and right optic nerves cross to the opposite side of the brain.
  • optical bench — an apparatus, as a special table or rigid beam, for the precise positioning of light sources, screens, and optical instruments used for optical and photometric studies, having a ruled bar to which these devices can be attached and along which they can be readily adjusted.
  • optical crown — an optical glass of low dispersion and relatively low refractive index. It is used in the construction of lenses
  • optical drive — optical disk drive
  • optical fiber — optical fibre
  • optical fibre — (communications)   (fibre optics, FO, US "fiber", light pipe) A plastic or glass (silicon dioxide) fibre no thicker than a human hair used to transmit information using infra-red or even visible light as the carrier (usually a laser). The light beam is an electromagnetic signal with a frequency in the range of 10^14 to 10^15 Hertz. Optical fibre is less susceptible to external noise than other transmission media, and is cheaper to make than copper wire, but it is much more difficult to connect. Optical fibres are difficult to tamper with (to monitor or inject data in the middle of a connection), making them appropriate for secure communications. The light beams do not escape from the medium because the material used provides total internal reflection. See also FDDI, Optical Carrier n, SONET.
  • optical flint — an optical glass of high dispersion and high refractive index containing lead oxide. They are used in the manufacture of lenses, artificial gems, and cut glass
  • optical glass — any of several types of high-quality, homogeneous, color-free glass, as flint or crown glass, having specified refractive properties, used in lenses and other components of optical systems.
  • optical mouse — (hardware)   Any kind of mouse that uses visible light or infrared to detect changes in its position.
  • optical sound — sound recorded on and subsequently played back from an optical or photographic soundtrack, as opposed to a magnetic soundtrack.
  • optical wedge — a wedge-shaped filter whose transmittance decreases from one end to the other: used as an exposure control device in sensitometry.
  • optimizations — Plural form of optimization.
  • orchestra pit — musicians' seating in front of stage
  • orchestra-pit — a group of performers on various musical instruments, including especially stringed instruments of the viol class, clarinets and flutes, cornets and trombones, drums, and cymbals, for playing music, as symphonies, operas, popular music, or other compositions.
  • organotherapy — the branch of therapeutics that deals with the use of remedies prepared from the organs of animals, as from the thyroid gland, the pancreas, or the suprarenal bodies.
  • organotropism — Physiology. the attraction of microorganisms or chemical substances to particular organs or tissues of the body.
  • ornithophobia — Fear of birds.
  • orthocephalic — having a medium or intermediate relation between the height of the skull and the breadth or length.
  • orthoepically — In terms of correct pronunciation.
  • orthographies — Plural form of orthography.
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