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14-letter words containing e, d, m

  • predevelopment — advance development; the action of developing in advance
  • premeditatedly — done deliberately; planned in advance: a premeditated murder.
  • prime meridian — the meridian running through Greenwich, England, from which longitude east and west is reckoned.
  • printed matter — any of various kinds of printed material that qualifies for a special postal rate.
  • procaine amide — a white, crystalline compound, C 1 3 H 2 1 ON 3 , used in the treatment of cardiac arrhythmias.
  • promenade deck — an upper deck or part of a deck on a passenger ship where passengers can stroll, often covered with a light shade deck.
  • promenade tile — a machine-made, unglazed, ceramic floor tile.
  • protected mode — An operating mode of Intel 80x86 processors. The opposite of real mode. The Intel 8088, Intel 8086, Intel 80188 and Intel 80186 had only real mode, processors beginning with the Intel 80286 feature a second mode called protected mode. In real mode, addresses are generated by adding an address offset to the value of a segment register shifted left four bits. As the segment register and address offset are 16 bits long this results in a 20-bit address. This is the origin of the one megabyte (2^20) limit in real mode. There are 4 segment registers on processors before the Intel 80386. The 80386 introduced two more segment registers. Which segment register is used depends on the instruction, on the addressing mode and of an optional instruction prefix which selects the segment register explicitly. In protected mode, the segment registers contain an index into a table of segment descriptors. Each segment descriptor contains the start address of the segment, to which the offset is added to generate the address. In addition, the segment descriptor contains memory protection information. This includes an offset limit and bits for write and read permission. This allows the processor to prevent memory accesses to certain data. The operating system can use this to protect different processes' memory from each other, hence the name "protected mode". While the standard register set belongs to the CPU, the segment registers lie "at the boundary" between the CPU and MMU. Each time a new value is loaded into a segment register while in protected mode, the corresponding descriptor is loaded into a descriptor cache in the (Segment-)MMU. On processors before the Pentium this takes longer than just loading the segment register in real mode. Addresses generated by the CPU (which are segment offsets) are passed to the MMU to be checked against the limit in the segment descriptor and are there added to the segment base address in the descriptor to form a linear address. On a 80386 or later, the linear address is further processed by the paged MMU before the result (the physical address) appears on the chip's address pins. The 80286 doesn't have a paged MMU so the linear address is output directly as the physical address. The paged MMU allows for arbitrary remapping of four klilobyte memory blocks (pages) through a translation table stored in memory. A few entries of this table are cached in the MMU's Translation Lookaside Buffer to avoid excessive memory accesses. After processor reset, all processors start in real mode. Protected mode has to be enabled by software. On the 80286 there exists no documented way back to real mode apart from resetting the processor. Later processors allow switching back to real mode by software. Software which has been written or compiled to run in protected mode must only use segment register values given to it by the operating system. Unfortunately, most application code for MS-DOS, written before the 286, will fail in protected mode because it assumes real mode addressing and writes arbitrary values to segment registers, e.g. in order to perform address calculations. Such use of segment registers is only really necessary with data structures that are larger than 64 kilobytes and thus don't fit into a single segment. This is usually dealt with by the huge memory model in compilers. In this model, compilers generate address arithmetic involving segment registers. A solution which is portable to protected mode with almost the same efficiency would involve using a table of segments instead of calculating new segment register values ad hoc. To ease the transition to protected mode, Intel 80386 and later processors provide "virtual 86 mode".
  • pseudo-medical — of or relating to the science or practice of medicine: medical history; medical treatment.
  • pseudomembrane — a tough outer layer found on the surface of the mucous membrane or skin
  • pseudomorphism — an irregular or unclassifiable form.
  • pseudonymously — bearing a false or fictitious name.
  • pseudosymmetry — an apparent symmetry different from that appropriate to a crystal of a given mineral.
  • pull-down menu — (operating system)   (Or "drop-down menu", "pop-down menu") A menu in a graphical user interface, whose title is normally visible but whose contents are revealed only when the user activates it, normally by pressing the mouse button while the pointer is over the title, whereupon the menu items appear below the title. The user may then select an item from the menu or click elsewhere, in either case the menu contents are hidden again. A menu item is selected either by dragging the mouse from the menu title to the item and releasing or by clicking the title and then the item. When a pull-down menu appears in the main area of a window, as opposed to the menu bar, it may have a small, downward-pointing triangle to the right. Compare: scrollable list.
  • pump attendant — a person who works in a garage or petrol station and who fills customers' cars with petrol
  • 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.
  • 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
  • quadrigeminate — made up of four parts
  • 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.
  • quasi-academic — of or relating to a college, academy, school, or other educational institution, especially one for higher education: academic requirements.
  • quasi-medieval — of, pertaining to, characteristic of, or in the style of the Middle Ages: medieval architecture. Compare Middle Ages.
  • quick-tempered — easily angered.
  • quitclaim deed — a deed that conveys to the grantee only such interests in property as the grantor may have, the grantee assuming responsibility for any claims brought against the property.
  • quoted company — a company whose shares are quoted on a stock exchange
  • 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.
  • 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
  • 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.
  • random numbers — a number chosen by a random sampling, as from a table (random number table) or generated by a computer.
  • random testing — (programming, testing)   A black-box testing approach in which software is tested by choosing an arbitrary subset of all possible input values. Random testing helps to avoid the problem of only testing what you know will work.
  • rawhide hammer — a hammer, used to avoid damaging a surface, having a head consisting of a metal tube from each end of which a tight roll of hide protrudes
  • re-accommodate — to do a kindness or a favor to; oblige: to accommodate a friend by helping him move to a new apartment.
  • re-embroidered — embellished with beads, tiny pearls, ribbon, etc. sewn on, usually by hand: said as of lace for bridal gowns
  • reach-me-downs — trousers
  • recommendation — an act of recommending.
  • recommendatory — serving to recommend; recommending.
  • record company — business: sells recorded music
  • redisbursement — the act or an instance of disbursing.
  • reform judaism — Judaism as observed by Reform Jews.
  • remedilessness — the state or quality of being remediless or incapable of being restored or corrected
  • removable disk — removable hard disk
  • residence time — Also called residence. Chemistry. the length of time a substance remains in the adsorbed, suspended, or dissolved state.
  • restiform body — a cordlike bundle of nerve fibers lying on each side of the medulla oblongata and connecting it with the cerebellum.
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