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18-letter words containing t, p, a

  • paleoclimatologist — the branch of paleogeography dealing with the study of paleoclimates.
  • par for the course — an equality in value or standing; a level of equality: The gains and the losses are on a par.
  • parachute regiment — an airborne regiment of an army
  • paraglyph printing — the printing of the positive and negative of a radiograph superimposed in slight misalignment to give the effect of a relief.
  • parallactic motion — the apparent motion of stars due to the earth's orbital motion.
  • parallel computing — parallel processing
  • parallel evolution — the independent development of closely corresponding adaptive features in two or more groups of organisms that occupy different but equivalent habitats, as marsupial mammals in Australia and placental mammals on other continents.
  • parallel importing — the importing of certain goods, esp pharmaceutical drugs, by dealers who undersell local manufacturers
  • 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.
  • parliamentarianism — advocacy of a parliamentary system of government.
  • partial derivative — the derivative of a function with respect to one of its variables with all other variables held constant.
  • partial evaluation — (compiler, algorithm)   (Or "specialisation") An optimisation technique where the compiler evaluates some subexpressions at compile-time. For example, Partial evaluation might change the termination properties of the program if, for example, the expression (x * 0) was reduced to 0 it would terminate even if x (and thus x * 0) did not. It may be necessary to reorder an expression to partially evaluate it, e.g. f x y = (x + y) + 1 g z = f 3 z If we rewrite f: f x y = (x + 1) + y then the expression x+1 becomes a constant for the function g and we can say g z = f 3 z = (3 + 1) + z = 4 + z Partial evaluation of built-in functions applied to constant arguments is known as constant folding. See also full laziness.
  • partial-vegetarian — a person who eats mostly plant foods, dairy products, and eggs, and occasionally chicken, fish, and red meat.
  • particeps criminis — an accomplice in a crime.
  • particular average — a loss at sea, as through accident or negligence, that is borne solely by the owner of the lost property. Abbreviation: P.A.
  • particulate filter — A particulate filter is a filter to remove particles that are present the air, for example in the exhaust of a diesel engine.
  • particulate matter — Particulate matter is solid or liquid particles in the air, which are measured in PM-10 units and are particles with a diameter of ten micrometers or less.
  • pass the hat round — to collect money, as for a cause
  • passing modulation — a modulation of a temporary nature.
  • passing-out parade — a ceremonial parade of cadets who have completed their training
  • passive euthanasia — a form of euthanasia in which medical treatment that will keep a dying patient alive for a time is withdrawn
  • passive resistance — opposition to a government or to specific governmental laws by the use of noncooperation and other nonviolent methods, as economic boycotts and protest marches.
  • 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.
  • pathologic anatomy — the branch of pathology dealing with the morphologic changes in tissues.
  • patron of the arts — someone who acts as a patron to or supports charities, organizations, and individuals that work in or concern the arts
  • pattern bargaining — a collective bargaining technique in which contract terms in one settlement are used as models to be imposed on other negotiating parties within an industry.
  • pave the way (for) — to prepare the way (for); facilitate the introduction (of)
  • pay one's respects — a particular, detail, or point (usually preceded by in): to differ in some respect.
  • payload specialist — an astronaut trained to handle highly complex or classified equipment carried aboard a space shuttle and to conduct experiments in space.
  • payment by results — a system of wage payment whereby all or part of the wage varies systematically according to the level of work performance of an employee
  • payment in advance — If a business asks for payment in advance, the payment must be received in full before the goods or services are delivered.
  • peak-to-peak value — Peak-to-peak value is the maximum voltage change occurring during one cycle of alternating voltage or current.
  • peano's postulates — a collection of axioms concerning the properties of the set of all positive integers, including the principle of mathematical induction.
  • peasant proprietor — a peasant who owns land, especially the land he or she tills.
  • 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
  • pellitory of spain — a small Mediterranean plant, Anacyclus pyrethrum, the root of which contains an oil formerly used to relieve toothache: family Asteraceae (composites)
  • pennsylvania dutch — the descendants of 17th- and 18th-century settlers in Pennsylvania from southwest Germany and Switzerland.
  • people trafficking — the practice of bringing immigrants into a country illegally
  • peppermint camphor — menthol.
  • per ardua ad astra — through difficulties to the stars: the motto of the RAF
  • percentile ranking — the percentage of scores that a particular score is greater than
  • 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
  • perceptual mapping — the use of a graph or map in the development of a new product, in which the proximity of consumers' images of the new product to those of an ideal product provide an indication of the new product's likely success
  • perfect participle — past participle.
  • perforated tracery — tracery, as in early Gothic architecture, formed of cut or pierced slabs of stone set on edge with the flat side outward.
  • performance artist — an artist that is involved in a theatrical presentation that incorporates various art forms, such as dance, sculpture, music, etc
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