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14-letter words containing a, d, r, e

  • pseudo-archaic — marked by the characteristics of an earlier period; antiquated: an archaic manner; an archaic notion.
  • pseudo-liberal — favorable to progress or reform, as in political or religious affairs.
  • pseudodipteral — having an arrangement of columns suggesting a dipteral structure but without the inner colonnade.
  • pseudomembrane — a tough outer layer found on the surface of the mucous membrane or skin
  • pseudopregnant — relating to the state of pseudopregnancy
  • pumped storage — a system for generating hydroelectric power for peak periods by pumping water from a lower to a higher reservoir during low-demand periods and then releasing it during peak periods.
  • purchase order — document requesting to buy sth
  • pure democracy — a form of democracy in which the laws and policies are made directly by the citizens rather than by representatives.
  • pyramid letter — chain letter.
  • pyramid scheme — pyramid (def 8).
  • pyramidal peak — a sharp peak formed where the ridges separating three or more cirques intersect; horn
  • pyrazolone dye — any of the group of dyes, as tartrazine, derived from a pyrazolone: used chiefly to dye silk and wool.
  • quadragenarian — 40 years of age.
  • quadrigeminate — made up of four parts
  • quadrilaterals — Plural form of quadrilateral.
  • quadrisyllable — a word of four syllables.
  • quadrumvirates — Plural form of quadrumvirate.
  • quadrupedalism — The condition of being a quadruped.
  • quadruple time — a measure consisting of four beats or pulses with accent on the first and third.
  • quadruplicated — Simple past tense and past participle of quadruplicate.
  • quadruplicates — Plural form of quadruplicate.
  • quarter dollar — quarter (def 3).
  • quarter window — (on a car) a small triangular side window with hinges that can be opened for extra ventilation
  • quasi-periodic — almost periodic
  • quodlibetarian — a person who writes, discusses or engages in quodlibets
  • race condition — Anomalous behavior due to unexpected critical dependence on the relative timing of events. For example, if one process writes to a file while another is reading from the same location then the data read may be the old contents, the new contents or some mixture of the two depending on the relative timing of the read and write operations. A common remedy in this kind of race condition is file locking; a more cumbersome remedy is to reorganize the system such that a certain processes (running a daemon or the like) is the only process that has access to the file, and all other processes that need to access the data in that file do so only via interprocess communication with that one process. As an example of a more subtle kind of race condition, consider a distributed chat network like IRC, where a user is granted channel-operator privileges in any channel he starts. If two users on different servers, on different ends of the same network, try to start the same-named channel at the same time, each user's respective server will grant channel-operator privileges to each user, since neither will yet have received the other's signal that that channel has been started. In this case of a race condition, the "shared resource" is the conception of the state of the network (what channels exist, as well as what users started them and therefore have what privileges), which each server is free to change as long as it signals the other servers on the network about the changes so that they can update their conception of the state of the network. However, the latency across the network makes possible the kind of race condition described. In this case, heading off race conditions by imposing a form of control over access to the shared resource -- say, appointing one server to be in charge of who holds what privileges -- would mean turning the distributed network into a centralized one (at least for that one part of the network operation). Where this is not acceptable, the more pragmatic solution is to have the system recognize when a race condition has occurred and to repair the ill effects. Race conditions also affect electronic circuits where the value output by a logic gate depends on the exact timing of two or more input signals. For example, consider a two input AND gate fed with a logic signal X on input A and its negation, NOT X, on input B. In theory, the output (X AND NOT X) should never be high. However, if changes in the value of X take longer to propagate to input B than to input A then when X changes from false to true, there will be a brief period during which both inputs are true, and so the gate's output will also be true. If this output is fed to an edge-sensitive component such as a counter or flip-flop then the temporary effect ("glitch") will become permanent.
  • radar operator — someone who operates the equipment used in radar, a method for detecting the position and velocity of a distant object
  • radiant energy — energy transmitted in wave motion, especially electromagnetic wave motion.
  • radiant heater — a heater that heats a building by radiant heat emitted from panels containing electrical conductors, hot water, etc
  • radiation belt — Van Allen belt.
  • radio cassette — A radio cassette is a radio and a cassette player together in a single machine.
  • radio engineer — an engineer who designs and repairs equipment used for radio broadcasting
  • radio operator — a person who operates or controls a radio transmitter
  • radio receiver — an apparatus that receives incoming modulated radio waves and converts them into sound
  • radio spectrum — the portion of the electromagnetic spectrum that includes radio waves.
  • radiochemistry — the chemical study of radioactive elements, both natural and artificial, and their use in the study of chemical processes.
  • radiofrequency — the frequency of the transmitting waves of a given radio message or broadcast.
  • radioresistant — resistant to the effects of radiation
  • radiosensitive — (of certain tissues or organisms) sensitive to or destructible by various types of radiant energy, as x-rays, rays from radioactive material, or the like.
  • radiosensitize — to make (cells) more sensitive to radiation
  • radiotelegraph — a telegraph in which messages or signals are sent by means of radio waves rather than through wires or cables.
  • radiotelemeter — the equipment used for radiotelemetry
  • radiotelemetry — the use of radio waves for transmitting information from a distant instrument to a device that indicates or records the measurements
  • radiotelephone — a telephone in which sound or speech is transmitted by means of radio waves instead of through wires or cables.
  • radiotelephony — the constructing or operating of radiotelephones.
  • radiotherapist — radiologist
  • radium sulfate — a white, crystalline, water-insoluble, poisonous, radioactive solid, RaSO 4 , used chiefly in radiotherapy.
  • radium therapy — treatment of disease by means of radium.
  • railway bridge — a bridge built to carry a railway over a road, river, etc
  • rainbow bridge — a natural stone bridge in S Utah: a national monument. 290 feet (88 meters) high; 275 feet (84 meters) span.
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