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18-letter words containing n, o, p, e, r

  • rapid eye movement — rapidly shifting, continuous movements of the eyes beneath closed lids during the stage of sleep characterized by dreaming.
  • rational operation — any of the mathematical operations of addition, subtraction, multiplication, and division.
  • reactive component — the component in an alternating-current circuit that does not contribute power because it is 90° out of phase with the voltage or current.
  • recess appointment — a person appointed to an office by the President of the United States without approval from the Senate because the Senate is in recess
  • reciprocating pump — A reciprocating pump is a pump which uses a backward and forward movement to move a fluid.
  • recovery operation — the process of locating and retrieving bodies, esp following an explosion or natural disaster
  • redevelopment area — an urban area in which all or most of the buildings are demolished and rebuilt
  • reentering polygon — a polygon having one or more reentering angles.
  • registered company — a company which has officially registered its business
  • registration plate — a plate mounted on the front and back of a motor vehicle bearing the registration number
  • 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.
  • reinforced plastic — plastic with fibrous matter, such as carbon fibre, embedded in it to confer additional strength
  • repayment mortgage — a mortgage that you pay back in monthly repayments which consist of the accrued interest in addition to the original amount borrowed
  • repeat performance — sth done again
  • report an accident — If you report an accident, you inform an insurer or the police or other authorities that an accident has occurred.
  • repossession order — If a bank or building society issues a repossession order, they officially tell someone that they are going to repossess their home.
  • reprocessing plant — a plant where materials are treated in order to make them reusable
  • reproduction proof — repro proof.
  • resurrection plant — a desert plant, Selaginella lepidophylla, occurring from Texas to South America, having stems that curl inward when dry.
  • retirement pension — income: no longer at work
  • ribbon development — housing or commercial buildings built along a stretch of road.
  • root canal therapy — endodontics.
  • russo-japanese war — the war (1904–1905) between Russia and Japan.
  • scissors-and-paste — designating or of a piece of writing that has been assembled from a variety of sources rather than by original research, often in a hasty or uninspired way
  • 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.
  • secondary syphilis — the second stage of syphilis, characterized by eruptions of the skin and mucous membrane.
  • 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-preoccupation — the state of being preoccupied.
  • semiprecious stone — See at semiprecious.
  • separation anxiety — the normal fear and apprehension expressed by infants when removed from their mothers or approached by strangers.
  • shipping container — a large, strong container, usually of metal, used to store goods in during shipment
  • shotgun microphone — a directional microphone with a narrow-angle range of sensitivity.
  • shunting operation — an operation in which rail coaches are manoeuvred
  • silvery spleenwort — a fern, Diplazium pycnocarpon, of eastern North America, having fronds from 20 to 30 inches (50.8 to 76.2 cm) long on yellowish-green stalks.
  • simple enumeration — a procedure for arriving at empirical generalizations by haphazard accumulation of positive instances.
  • sling psychrometer — a psychrometer so designed that the wet-bulb thermometer can be ventilated, to expedite evaporation, by whirling in the air.
  • slow-motion replay — a showing again in slow motion of a sequence of action, esp of part of a sporting contest immediately after it happens
  • small pastern bone — the part of the foot of a horse, cow, etc., between the fetlock and the hoof.
  • software backplane — (programming, tool)   A CASE framework from Atherton.
  • solitary sandpiper — a North American sandpiper, Tringa solitaria, of inland wetlands, having a brownish-gray, white-spotted back and whitish underparts.
  • something to spare — a surplus of something
  • sonic depth finder — a sonar instrument that uses echolocation to measure depths under water.
  • sound spectrograph — an electronic device for recording a sound spectogram.
  • speech recognition — Computers. the computerized analysis of spoken words in order to identify the speaker, as in security systems, or to respond to voiced commands: the analysis is performed by finding patterns in the spectrum of the incoming sound and comparing them with stored patterns of elements of sound, as phones, or of complete words.
  • sperry corporation — (company)   The company which merged with the Burroughs Corporation to form Unisys Corporation. Divisions included Sperry Univac, Sperry Flight Systems, and others. Some of these were sold off after the merger.
  • spread one's wings — to make full use of one's abilities
  • spur-of-the-moment — occurring or done without advance preparation or deliberation; extemporaneous; unplanned: a spur-of-the-moment decision.
  • stroustrup, bjarne — Bjarne Stroustrup
  • summary proceeding — a mode of trial authorized by statute to be held before a judge without the usual full hearing.
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