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18-letter words containing p, a, t, i

  • personal assistant — aide
  • personal exemption — Your personal exemption is the amount of money that is deducted from your gross income before you have to start paying income tax.
  • 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
  • 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).
  • 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
  • photochemical smog — air pollution containing ozone and other reactive chemical compounds formed by the action of sunlight on nitrogen oxides and hydrocarbons, especially those in automobile exhaust.
  • photoisomerization — isomerization induced by light.
  • photosensitization — to make (a material) photosensitive, as by the application of a photosensitive emulsion.
  • 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.
  • physical chemistry — the branch of chemistry dealing with the relations between the physical properties of substances and their chemical composition and transformations.
  • 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.
  • physical therapist — sb who performs physiotherapy
  • phytohemagglutinin — a lectin, obtained from the red kidney bean, that binds to the membranes of T cells and stimulates metabolic activity, cell division, etc.
  • pig-tailed macaque — a forest-dwelling southeast Asian macaque, Macaca nemestrina, having a short, curled tail, colonized for animal behavior studies.
  • pigmy hippopotamus — a related but smaller animal, Choeropsis liberiensis
  • pileolated warbler — either of two western subspecies of Wilson's warbler.
  • pilotless aircraft — an aircraft equipped for operation by radio or by robot control, without a human pilot aboard; drone.
  • pitch-and-run shot — chip shot.
  • plane polarization — a type of polarization in which the electric vector of waves of light or other electromagnetic radiation is restricted to vibration in a single plane
  • plane trigonometry — the branch of trigonometry dealing with plane triangles.
  • plate-glass window — a window that has glass which has been formed by rolling
  • platinocyanic acid — the hypothetical acid containing platinum and the cyano group, H 2 Pt(CN) 4 .
  • plenum ventilation — a system of mechanical ventilation in which fresh air is forced into the spaces to be ventilated from a chamber (plenum chamber) at a pressure slightly higher than atmospheric pressure, so as to expel foul air.
  • pneumatic conveyor — a tube through which powdered or granular material, such as cement, grain, etc is transported by a flow of air
  • point d'angleterre — a bobbin lace in which the design is worked out with either a needle or bobbin.
  • point of departure — Nautical. the precise location of a vessel, established in order to set a course, especially in beginning a voyage in open water.
  • point-bearing pile — a pile depending on the soil or rock beneath its foot for support.
  • policeman's helmet — a Himalayan balsaminaceous plant, Impatiens glandulifera, with large purplish-pink flowers, introduced into Britain
  • political football — a political issue that is continually debated but has not yet been resolved
  • political prisoner — sb imprisoned for political dissidence
  • political question — a question regarded by the courts as being a matter to be determined by another department of government rather than of law and therefore one with which they will not deal, as the recognition of a foreign state.
  • politically-minded — (of a person or group of people) interested in the way power is achieved and used in a country or society (through government, policy-making, etc)
  • 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.
  • polynesian tattler — a sandpiper, H. incanus, native to the Pacific coastal regions
  • pontifical college — the chief body of priests in ancient Rome.
  • population balance — A population balance is a model showing particle sizes during a grinding process, which is used when designing a process.
  • population control — a policy of attempting to limit the growth in numbers of a population, esp in poor or densely populated parts of the world, by programmes of contraception or sterilization
  • population density — ratio: inhabitants to area
  • population figures — population totals; statistics relating to the size of populations
  • population pyramid — a graph showing the distribution of a population by sex, age, etc.
  • porcupine anteater — an echidna or spiny anteater.
  • portable equipment — Portable equipment is electrical equipment that can easily be moved from one place to another while in operation or while connected to the supply.
  • portage la prairie — a city in S Manitoba, in S central Canada, W of Winnipeg.
  • portal circulation — blood flow in a portal system.
  • portrait of a lady — a novel (1881) by Henry James.
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