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18-letter words containing pr

  • provascular tissue — procambium.
  • provincetown print — a print made from a woodblock incised with grooves that serve to separate the colors being used and to leave white lines highlighting the design.
  • provincial council — (formerly) a council administering any of the New Zealand provinces
  • provision merchant — a person or company in the business of retailing food and other provisions
  • przewalski's horse — a wild horse, Equus caballus przevalskii, chiefly of Mongolia and Sinkiang, characterized by light yellow coloring and a stiff, upright black mane with no forelock: the only remaining breed of wild horse, it is now endangered and chiefly maintained in zoos.
  • qattara depression — a desert basin in the Libyan Desert, in NW Egypt: lowest point is 435 feet (133 meters) below sea level. 6950 sq. mi. (18,000 sq. km).
  • rabbit-proof fence — a fence through which rabbits are unable to pass
  • radiation pressure — the pressure exerted on a surface by electromagnetic radiation or by sound waves.
  • radical expression — an expression in which radical signs appear.
  • reciprocating pump — A reciprocating pump is a pump which uses a backward and forward movement to move a fluid.
  • regular expression — 1.   (text, operating system)   (regexp, RE) One of the wild card patterns used by Perl and other languages, following Unix utilities such as grep, sed, and awk and editors such as vi and Emacs. Regular expressions use conventions similar to but more elaborate than those described under glob. A regular expression is a sequence of characters with the following meanings (in Perl, other flavours vary): An ordinary character (not one of the special characters discussed below) matches that character. A backslash (\) followed by any special character matches the special character itself. The special characters are: "." matches any character except newline; "RE*" (where RE is any regular expression and the "*" is called the "Kleene star") matches zero or more occurrences of RE. If there is any choice, the longest leftmost matching string is chosen. "^" at the beginning of an RE matches the start of a line and "$" at the end of an RE matches the end of a line. (RE) matches whatever RE matches and \N, where N is a digit, matches whatever was matched by the RE between the Nth "(" and its corresponding ")" earlier in the same RE. Many flavours use \(RE\) instead of just (RE). The concatenation of REs is a RE that matches the concatenation of the strings matched by each RE. RE1 | RE2 matches whatever RE1 or RE2 matches. \< matches the beginning of a word and \> matches the end of a word. Many flavours use "\b" instead as the special character for "word boundary". RE{M} matches M occurences of RE. RE{M,} matches M or more occurences of RE. RE{M,N} matches between M and N occurences. Other flavours use RE\{M\} etc. Perl provides several "quote-like" operators for writing REs, including the common // form and less common ??. A comprehensive survey of regexp flavours is found in Friedl 1997 (see below). 2. Any description of a pattern composed from combinations of symbols and the three operators: Concatenation - pattern A concatenated with B matches a match for A followed by a match for B. Or - pattern A-or-B matches either a match for A or a match for B. Closure - zero or more matches for a pattern. The earliest form of regular expressions (and the term itself) were invented by mathematician Stephen Cole Kleene in the mid-1950s, as a notation to easily manipulate "regular sets", formal descriptions of the behaviour of finite state machines, in regular algebra.
  • representativeness — a person or thing that represents another or others.
  • reprocessing plant — a plant where materials are treated in order to make them reusable
  • reproduction proof — repro proof.
  • retail price index — The retail price index is a list of the prices of typical goods which shows how much the cost of living changes from one month to the next.
  • sea-level pressure — the atmospheric pressure, at any elevation, reduced by formula to a value approximating the pressure at sea level.
  • seafloor spreading — a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out.
  • seasonal promotion — Seasonal promotions are items marketed to customers at the appropriate time of year, such as coats in the winter and bathing suits in the summer.
  • self-comprehending — to understand the nature or meaning of; grasp with the mind; perceive: He did not comprehend the significance of the ambassador's remark.
  • self-deprecatingly — in a self-deprecating manner
  • self-preoccupation — the state of being preoccupied.
  • semiprecious stone — See at semiprecious.
  • set priority level — (SPL) The way traditional Unix kernels implement mutual exclusion by running code at high interrupt priority levels and thus blocking lower level interrupts.
  • shatterproof glass — glass designed to resist shattering
  • solubility product — the maximum number of undissociated ions, of an electrolyte in a saturated solution, capable at a given temperature of remaining in equilibrium with the undissolved phase of the solution.
  • special prosecutor — (formerly) an independent counsel.
  • spread one's wings — to make full use of one's abilities
  • summary proceeding — a mode of trial authorized by statute to be held before a judge without the usual full hearing.
  • supraorbital ridge — browridge.
  • surprise, surprise — You can say 'surprise, surprise' if you disapprove of something because it is not surprising or original, or could easily have been predicted.
  • sustaining program — a radio or television program without a commercial sponsor.
  • system-programming — a program, as an operating system, compiler, or utility program, that controls some aspect of the operation of a computer (opposed to application program).
  • systems programmer — a person whose job is to program systems software
  • the practicalities — the real facts or details of a situation, as opposed to its theoretical aspects
  • three-body problem — the problem of calculating the motions of three bodies in space moving under the influence of only their mutual gravitational attraction.
  • to get a bad press — If someone or something gets a bad press, they are criticized, especially in the newspapers, on television, or on radio. If they get a good press, they are praised.
  • transverse process — a process that projects from the sides of a vertebra.
  • two-colour process — (in early colour photography) a method of printing which uses superimposed red and green images
  • under-depreciation — decrease in value due to wear and tear, decay, decline in price, etc.
  • vigoureux printing — a printing method in which worsted fibers are printed with the desired color while in sliver form and then processed into yarn, producing a mixed color in the spun yarn and woven fabric.
  • visiting professor — a professor from another institution invited to teach at a university or college for a limited period, usually for a semester or one academic year.
  • wildlife programme — (esp on television) a documentary whose subject is wild animals in their natural habitat or undomesticated fauna and flora generally
  • work-study program — a program enabling high-school or college students to combine academic work with actual job experience.
  • wpa pre-shared key — Wi-Fi Protected Access Pre-Shared Key
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