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20-letter words containing o, p, h, r, i, t

  • photoelectric effect — the phenomenon in which the absorption of electromagnetic radiation, as light, of sufficiently high frequency by a surface, usually metallic, induces the emission of electrons from the surface.
  • photogelatin process — collotype (def 1).
  • photophosphorylation — phosphorylation that utilizes light as a source of energy, as in the formation of ATP from ADP and phosphorus during photosynthesis.
  • phthalocyanine green — a pigment used in painting, derived from chlorinated copper phthalocyanine and characterized chiefly by its intense green color and permanence.
  • physical double star — two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together and comprise a single physical system (physical double star)
  • physical meteorology — the branch of meteorology dealing with the study of optical, electrical, acoustical, and thermodynamic phenomena in the atmosphere, including the physics of clouds and precipitation.
  • polyanthus narcissus — a Eurasian amaryllidaceous plant, Narcissus tazetta, having clusters of small yellow or white fragrant flowers
  • polymorphic function — a function in a computer program that can deal with a number of different types of data
  • poor man's something — a (cheaper) substitute for something
  • portrait photography — the activity or art of taking portrait photos
  • post-synchronization — the recording of dialogue and sound effects in synchronization with the picture after the film has been shot.
  • posted write-through — A cache with a posted write-through policy (e.g. Intel 80386) delays the write-back to main memory until the bus is not in use.
  • potassium bichromate — an orange-red, crystalline, water-soluble, poisonous powder, K 2 Cr 2 O 7 , used chiefly in dyeing, photography, and as a laboratory reagent.
  • potassium dichromate — an orange-red crystalline soluble solid substance that is a good oxidizing agent and is used in making chrome pigments and as a bleaching agent. Formula: K2Cr2O7
  • prepositional phrase — a phrase consisting of a preposition, its object, which is usually a noun or a pronoun, and any modifiers of the object, as in the gray desk I use.
  • pride of the morning — light mist or precipitation observed at sea in the morning and regarded as indicating a fine day.
  • prime number theorem — the theorem that the number of prime numbers less than or equal to a given number is approximately equal to the given number divided by its natural logarithm.
  • priority inheritance — (parallel)   A technique for avoiding priority inversion by temporarily raising the prioriry of all processes that want to access a shared resource to the highest priority level of any of them. Priority inversion occurs where a low priority process, L is holding a resource required by a high priority process, H, but L is not running because a medium priority process, M is running. Under priority inheritance, L temporarily inherits H's priority, allowing L to run and release the resource H is waiting for. For example, an ambulance (H) is stuck behind a lorry (L) waiting at a junction (the shared resource) for a gap in a line of cars (M) using the junction. Applying priority inheritance, the cars give way to the lorry as they would to the ambulance, thus allowing the lorry and then the ambulance to use the junction.
  • proactive inhibition — the tendency for earlier memories to interfere with the retrieval of material learned later
  • prohibited substance — a substance, such as a drug, etc, that is banned or forbidden by law or other authority
  • proof of the pudding — the true value or quality of something, as seen when it is experienced, tried, or put to use: The proof of the pudding for a business is what customers say about it.
  • prosthetic dentistry — prosthodontics.
  • psychiatric hospital — institution treating mental disorders
  • psychometric testing — the use of psychometric tests, often as a selection method
  • psychomotor epilepsy — temporal-lobe epilepsy.
  • queen of the prairie — a tall plant, Filipendula rubra, of the rose family, having branching clusters of pink flowers, growing in meadows and prairies.
  • recreational therapy — therapy by means of recreational activities engaged in by the patient
  • rocky mountain sheep — bighorn.
  • satellite photograph — a photograph taken by an artificial satellite from space
  • schizoid personality — sb with identity disorder
  • semiautobiographical — pertaining to or being a fictionalized account of an author's own life.
  • serve a person right — to pay a person back, esp for wrongful or foolish treatment or behaviour
  • sex change operation — a surgical operation designed to change a person's physical sexual characteristics to those of the opposite sex
  • sharp-tailed sparrow — a sparrow, Ammospiza caudacuta, inhabiting salt marshes in North America, having narrow, sharply pointed tail feathers.
  • slip through the net — If criminals slip through the net, they avoid being caught by the system or trap that was meant to catch them.
  • south american plate — a major tectonic division of the earth's crust, comprising the continent of South America and several ocean basins and bounded on the north by the Caribbean Plate, on the east by the Mid-Atlantic Ridge, on the west by a submarine trench that borders the western coast of the continent, and on the south by the Antarctic Plate.
  • spanish oyster plant — a composite plant, Scolymus hispanicus, of southern Europe, having spiny, thistlelike leaf margins, small yellow flowers, and an edible root.
  • special relationship — the exceptionally close political, diplomatic, cultural and historical relations between the United States and the United Kingdom
  • spectrophotoelectric — pertaining to the relationship between the wavelength of the incident radiation and the number of electrons released by a photoelectric substance.
  • spherical aberration — variation in focal length of a lens or mirror from center to edge, due to its spherical shape.
  • spherical coordinate — Usually, spherical coordinates. any of three coordinates used to locate a point in space by the length of its radius vector and the angles this vector makes with two perpendicular polar planes.
  • spirits of hartshorn — a colorless, pungent, suffocating, aqueous solution of about 28.5 percent ammonia gas: used chiefly as a detergent, for removing stains and extracting certain vegetable coloring agents, and in the manufacture of ammonium salts.
  • state highway patrol — a state's road traffic police
  • step into the breach — If you step into the breach, you do a job or task which someone else was supposed to do or has done in the past, because they are suddenly unable to do it.
  • switchboard operator — a person who operates an installation in a telephone exchange, office, hotel, etc, at which the interconnection of telephone lines is manually controlled
  • telephone subscriber — a person who subscribes to a telephone service
  • the legal profession — the profession of law
  • the price of someone — what someone deserves, esp a fitting punishment
  • the thinking process — thought; the activity of thinking
  • therapeutic abortion — abortion performed when a woman's pregnancy endangers her health.
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