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19-letter words containing c, g

  • percussion drilling — Percussion drilling is a drilling method which involves lifting and dropping heavy tools to break rock, and uses steel casing tubes to stop the borehole from collapsing.
  • perfect progressive — a verb form including the auxiliary have followed by been and a present participle, noting the continuation of an activity or event, its incompleteness or interruption, and its connection to the temporal point of reference, as in I've been waiting for over an hour, They had been talking about her before she came into the room, or In July, he will have been living here for two years.
  • performance figures — the statistics that indicate how well or badly a company or organization has performed
  • performance targets — the expected or predicted success level of an individual, company or organization
  • philosophical logic — the branch of philosophy that studies the relationship between formal logic and ordinary language, esp the extent to which the former can be held accurately to represent the latter
  • photographic memory — total recall
  • physical addressing — (networking)   The low level addressing scheme used on Ethernet. The 48-bit destination Ethernet address in a packet is compared with the receiving node's Ethernet address. Compare IP address.
  • piggyback investing — Piggyback investing is a situation in which a broker repeats a trade on his own behalf immediately after trading for an investor, because he thinks the investor may have inside information.
  • pilgrimage of grace — a rebellion in 1536 in N England against the Reformation and Henry VIII's government
  • pneumatic conveying — Pneumatic conveying is the movement of powdered or granulated solids using air.
  • pneumoencephalogram — an encephalogram made after the replacement of the cerebrospinal fluid by air or gas, rarely used since the development of the CAT scanner.
  • pneumogastric nerve — the vagus nerve.
  • political geography — the branch of human geography that deals with the relationship between political processes and spatial structures (regions, territories, etc)
  • polyethylene glycol — any of a series of polymers of ethylene glycol, having a molecular weight of from about 200 to 6000, obtained by condensation of ethylene glycol or of ethylene oxide and water, used as an emulsifying agent and lubricant in ointments, creams, etc.
  • polyphonic ringtone — (in mobile phones) a ringtone in which more than one musical note is played at the same time
  • population genetics — the branch of genetics concerned with the hereditary makeup of populations.
  • postage and packing — the cost of packing and mailing an item bought by post
  • prescription charge — a charge, set by the government, to be paid by a patient for medicines
  • pretty good privacy — (tool, cryptography)   (PGP) A high security RSA public-key encryption application for MS-DOS, Unix, VAX/VMS, and other computers. It was written by Philip R. Zimmermann <[email protected]> of Phil's Pretty Good(tm) Software and later augmented by a cast of thousands, especially including Hal Finney, Branko Lankester, and Peter Gutmann. PGP was distributed as "guerrilla freeware". The authors don't mind if it is distributed widely, just don't ask Philip Zimmermann to send you a copy. PGP uses a public-key encryption algorithm claimed by US patent #4,405,829. The exclusive rights to this patent are held by a California company called Public Key Partners, and you may be infringing this patent if you use PGP in the USA. This is explained in the PGP User's Guide, Volume II. PGP allows people to exchange files or messages with privacy and authentication. Privacy and authentication are provided without managing the keys associated with conventional cryptographic software. No secure channels are needed to exchange keys between users, which makes PGP much easier to use. This is because PGP is based on public-key cryptography. PGP encrypts data using the International Data Encryption Algorithm with a random session key, and uses the RSA algorithm to encrypt the session key. In December 1994 Philip Zimmermann faced prosecution for "exporting" PGP out of the United States but in January 1996 the US Goverment dropped the case. A US law prohibits the export of encryption software out of the country. Zimmermann did not do this, but the US government hoped to establish the proposition that posting an encryption program on a BBS or on the Internet constitutes exporting it - in effect, stretching export control into domestic censorship. If the government had won it would have had a chilling effect on the free flow of information on the global network, as well as on everyone's privacy from government snooping.
  • printing discussion — [XEROX PARC] A protracted, low-level, time-consuming, generally pointless discussion of something only peripherally interesting to all.
  • priority scheduling — (operating system)   Processes scheduling in which the scheduler selects tasks to run based on their priority as opposed to, say, a simple round-robin. Priorities may be static or dynamic. Static priorities are assigned at the time of creation, while dynamic priorities are based on the processes' behaviour while in the system. For example, the scheduler may favour I/O-intensive tasks so that expensive requests can be issued as early as possible. A danger of priority scheduling is starvation, in which processes with lower priorities are not given the opportunity to run. In order to avoid starvation, in preemptive scheduling, the priority of a process is gradually reduced while it is running. Eventually, the priority of the running process will no longer be the highest, and the next process will start running. This method is called aging.
  • procedural language — (language)   Any programming language in which the programmer specifies an explicit sequences of steps to follow to produce a result (an algorithm). The term should not be confused with "imperative language" - a language that specifies explicit manipulation of state. An example (non-imperative) procedural language is LOGO, which specifies sequences of steps to perform but does not have an internal state. Other procedural languages include Basic, Pascal, C, and Modula-2. Both procedural and imperative languages are in contrast to declarative languages, in which the programmer specifies neither explicit steps nor explicit state manipulation.
  • process engineering — the branch of engineering concerned with industrial processes, esp continuous ones, such as the production of petrochemicals
  • proctosigmoidoscope — sigmoidoscope.
  • proctosigmoidoscopy — sigmoidoscopy.
  • programmer's switch — (hardware)   A button on the front of some Apple Macintosh computers which, when pressed, causes a command line prompt to appear. This gives access to the built-in mini-debugger, which has commands to dump memory, return to the application that was broken out, and others. A more sophisticated debugger must be installed in order to inspect breakpoints, etc.
  • projection printing — the act or process of making projection prints.
  • projective geometry — the geometric study of projective properties.
  • propositional logic — (logic)   (or "propositional calculus") A system of symbolic logic using symbols to stand for whole propositions and logical connectives. Propositional logic only considers whether a proposition is true or false. In contrast to predicate logic, it does not consider the internal structure of propositions.
  • pseudo-biographical — of or relating to a person's life: He's gathering biographical data for his book on Milton.
  • pseudo-hieroglyphic — noting or pertaining to a script dating from the second millennium b.c. that appears to be syllabic and to represent the Phoenician language and that is inscribed on objects found at Byblos.
  • pseudopsychological — of or relating to psychology.
  • psychoendocrinology — the study of the relationship between the endocrine system and various symptoms or types of mental illness.
  • psychological novel — a novel that focuses on the complex mental and emotional lives of its characters and explores the various levels of mental activity.
  • psychophysiological — of or relating to psychophysiology.
  • psychotechnological — of or relating to psychotechnology
  • pugwash conferences — international peace conferences of scientists held regularly to discuss world problems: Nobel peace prize 1995 awarded to Joseph Rotblat (1908–2005) , one of the founders of the conferences, secretary-general (1957–73), and president (1988–97)
  • quick-change artist — a person adept at changing from one thing to another, as an entertainer who changes costumes quickly during a performance.
  • radiational cooling — the cooling of the earth's surface and adjacent air, primarily at night, caused by a loss of heat due to surface emission of infrared radiation.
  • radiochromatography — chromatography in which radiolabeled substances on the chromatogram are determined quantitatively or qualitatively by measuring their radioactivity.
  • rayleigh scattering — the scattering of light by particles that are very small in relation to the wavelength of the light, and in which the intensity of the scattered light varies inversely with the fourth power of the wavelength.
  • reciprocal exchange — an unincorporated association formed so that its members can participate in reciprocal insurance.
  • reciprocal leveling — leveling between two widely separated points in which observations are made in both directions to eliminate the effects of atmospheric refraction and the curvature of the earth.
  • recording equipment — devices used for sound reproduction
  • recording secretary — an officer charged with keeping the minutes of meetings and responsible for the records.
  • register allocation — (compiler, algorithm)   The phase of a compiler that determines which values will be placed in registers. Register allocation may be combined with register assignment. This problem can be shown to be isomorphic to graph colouring by relating values to nodes in the graph and registers to colours. Values (nodes) which must be valid simultaneously are linked by edges and cannot be stored in the same register (coloured the same). See also register dancing and register spilling.
  • regular icosahedron — an icosahedron in which each of the faces is an equilateral triangle
  • releasing mechanism — a hypothetical control complex in the central nervous system of animals that triggers the appropriate behavioral response to a releaser.
  • religious education — religion as school subject
  • removable cartridge — a hard disk enclosed in a case that can be removed from the disk drive, having more storage than floppy disks.
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