19-letter words containing c, o, d, e, t, r
- necessary condition — prerequisite
- neighbourhood watch — a scheme under which members of a community agree together to take responsibility for keeping an eye on each other's property, as a way of preventing crime
- no strings attached — without conditions
- northwest ordinance — the act of Congress in 1787 providing for the government of the Northwest Territory and setting forth the steps by which its subdivisions might become states.
- noughts and crosses — tick-tack-toe (def 1).
- noughts-and-crosses — tick-tack-toe (def 1).
- object-oriented sql — (language) (OSQL) A functional language, a superset of SQL, used in Hewlett-Packard's OpenODB database system.
- officer of the deck — a naval duty officer responsible for the operation of the ship in the absence of the captain or the executive officer. Abbreviation: O.O.D.
- olive-backed thrush — Swainson's thrush.
- on no consideration — for no reason whatsoever; never
- operations director — a director or senior manager who oversees the efficiency of business operations
- optical double star — two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together and comprise a single physical system (physical double star)
- optical mark reader — (hardware) (OMR) A special scanning device that can read carefully placed pencil marks on specially designed documents. OMR is frequenty used in forms, questionnaires, and answer-sheets.
- orthopaedic surgeon — a surgeon specializing in the branch of surgery concerned with disorders of the spine and joints and the repair of deformities of these parts
- orthopaedic surgery — surgery concerned with disorders of the spine and joints and the repair of deformities of these parts
- overhead projection — the projection (using an overhead projector) of an enlarged image of a transparency onto a surface above and behind the person using it
- oxidation-reduction — a chemical reaction between two substances in which one substance is oxidized and the other reduced.
- parathyroid extract — an aqueous preparation obtained from the parathyroid gland of cattle, used in medicine chiefly in cases of parathyroid deficiency and in veterinary medicine in the treatment of tetanic convulsions.
- particle dispersoid — A particle dispersoid is a suspension of solid particles in a gas.
- pedestrian crossing — place to cross road
- phenylthiocarbamide — a crystalline, slightly water-soluble solid, C 6 H 5 NHCSNH 2 , that is either tasteless or bitter, depending upon the heredity of the taster, and is used in medical genetics and as a diagnostic.
- pileated woodpecker — a large, black-and-white American woodpecker, Dryocopus pileatus, having a prominent red crest.
- plastic deformation — In plastic deformation a material changes shape when a stress is applied to it and does not go back to its original state when the stress is removed.
- pocket-handkerchief — handkerchief (def 1).
- police headquarters — building where police are stationed
- post-and-rail fence — a fence constructed of upright wooden posts with horizontal timber slotted through it
- predicate objective — objective complement.
- preproduction model — a prototype of a product before the product goes into full-scale production
- preproduction trial — a trial to test a prototype of a product before the product goes into full-scale production
- 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.
- 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.
- proctosigmoidoscope — sigmoidoscope.
- promotions director — someone in charge of encouraging the sale of (a product) by advertising or securing financial support
- pseudo-aristocratic — of or relating to government by an aristocracy.
- pseudo-conservative — disposed to preserve existing conditions, institutions, etc., or to restore traditional ones, and to limit change.
- radioactive fallout — the settling to the ground of airborne particles ejected into the atmosphere from the earth by explosions, eruptions, forest fires, etc., especially such settling from nuclear explosions (radioactive fallout) Compare rainout.
- radiopharmaceutical — any of a number of radioactive drugs used diagnostically or therapeutically.
- radius of curvature — the absolute value of the reciprocal of the curvature at a point on a curve.
- reactive depression — depression occurring in response to some situational stress, as loss of one's job.
- recording equipment — devices used for sound reproduction
- recording secretary — an officer charged with keeping the minutes of meetings and responsible for the records.
- reduction potential — (in a galvanic cell) the potential of the electrode at which reduction occurs.
- reference electrode — an electrode of known oxidation potential used in determining the electromotive force of a galvanic cell.
- reinforced concrete — concrete containing steel bars, strands, mesh, etc., to absorb tensile and shearing stresses.
- 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.
- reserved occupation — in time of war, an occupation from which one will not be called up for military service
- resonance radiation — radiation emitted by an atom or molecule, having the same frequency as that of an incident particle, as a photon, and usually involving a transition to the lowest energy level of the atom or molecule.
- reticuloendothelial — pertaining to, resembling, or involving cells of the reticuloendothelial system.
- royal correspondent — a journalist who reports on matters relating to royalty