21-letter words containing a, c, e, p, t, b
- acceptable use policy — (networking) (AUP) Rules applied by many transit networks which restrict the use to which the network may be put. A well known example is NSFNet which does not allow commercial use. Enforcement of AUPs varies with the network.
- airborne command post — any of several converted commercial aircraft equipped with special communications and code gear, intended as flying bunkers for the president, secretary of defense, military commanders, or their designated replacements.
- background projection — the projection from the rear of previously photographed material on a translucent screen, used as background for a television or motion-picture shot.
- barrier contraceptive — any form of contraceptive that prevents impregnation by physically preventing the sperm from reaching the egg
- beta-naphthyl radical — Also called alpha-naphthyl group, alpha-naphthyl radical. the univalent group C 1 0 H 7 –, having a replaceable hydrogen atom in the first, or alpha, position; 1-naphthyl group.
- blot on the landscape — If you describe something such as a building as a blot on the landscape, you mean that you think it is very ugly and spoils an otherwise attractive place.
- breath-of-life packet — (XEROX PARC) An Ethernet packet that contains bootstrap code, periodically sent out from a working computer to infuse the "breath of life" into any computer on the network that has crashed. Computers depending on such packets have sufficient hardware or firmware code to wait for (or request) such a packet during the reboot process. See also dickless workstation. The notional "kiss-of-death packet", with a function complementary to that of a breath-of-life packet, is recommended for dealing with hosts that consume too many network resources. Though "kiss-of-death packet" is usually used in jest, there is at least one documented instance of an Internet subnet with limited address-table slots in a gateway computer in which such packets were routinely used to compete for slots, rather like Christmas shoppers competing for scarce parking spaces.
- buffalo carpet beetle — any of several small beetles of the family Dermestidae, the larvae of which are household pests, feeding on rugs and other woolen fabrics, especially Anthrenus scrophulariae (buffalo carpet beetle) and Attagenus piceus (black carpet beetle)
- combination principle — Ritz combination principle.
- countably compact set — a set for which every cover consisting of a countable number of sets has a subcover consisting of a finite number of sets.
- empirical probability — a measure or estimate of the degree of confidence one may have in the occurrence of an event, defined as the proportion observed in a sample
- european central bank — the central bank of the European Union, established in 1998 to oversee the process of European Monetary Union and subsequently to direct monetary policy within the countries using the euro
- generic type variable — (programming) (Also known as a "schematic type variable"). Different occurrences of a generic type variable in a type expression may be instantiated to different types. Thus, in the expression let id x = x in (id True, id 1) id's type is (for all a: a -> a). The universal quantifier "for all a:" means that a is a generic type variable. For the two uses of id, a is instantiated to Bool and Int. Compare this with let id x = x in let f g = (g True, g 1) in f id This looks similar but f has no legal Hindley-Milner type. If we say f :: (a -> b) -> (b, b) this would permit g's type to be any instance of (a -> b) rather than requiring it to be at least as general as (a -> b). Furthermore, it constrains both instances of g to have the same result type whereas they do not. The type variables a and b in the above are implicitly quantified at the top level: f :: for all a: for all b: (a -> b) -> (b, b) so instantiating them (removing the quantifiers) can only be done once, at the top level. To correctly describe the type of f requires that they be locally quantified: f :: ((for all a: a) -> (for all b: b)) -> (c, d) which means that each time g is applied, a and b may be instantiated differently. f's actual argument must have a type at least as general as ((for all a: a) -> (for all b: b)), and may not be some less general instance of this type. Type variables c and d are still implicitly quantified at the top level and, now that g's result type is a generic type variable, any types chosen for c and d are guaranteed to be instances of it. This type for f does not express the fact that b only needs to be at least as general as the types c and d. For example, if c and d were both Bool then any function of type (for all a: a -> Bool) would be a suitable argument to f but it would not match the above type for f.
- imprecise probability — (probability) A probability that is represented as an interval (as opposed to a single number) included in [0,1].
- integer specbaseratio — SPECbase_int92
- magnetic permeability — permeability (def 2).
- mass-market paperback — a relatively inexpensive paperbound book, typically measuring about 4½ × 7 inches (11 × 18 cm), that is distributed on newsstands, in supermarkets, etc., as well as in bookstores.
- metabotropic receptor — an indirect receptor which initiates an intracellular biochemical cascade after it is triggered by an agonistic ligand
- optical double (star) — double star (sense 2)
- pipelined burst cache — Pipeline Burst Cache
- portable commodore 64 — (computer) A version of the Commodore 64 modelled after the original Osborne portable PCs, with a flip-down keyboard that revealed a 5-inch colour monitor, and a built-in 1541 floppy disk drive. It is thought that few were made but that they did go on sale, at least in Canada.
- portable common loops — (PCL) A language which started out as an implementation of CommonLoops and turned into a portable CLOS implementation. Version 1992-08-28. It runs under Lucid Common LISP 4.0.1 and CMU Common LISP 16e.
- potassium bicarbonate — a white, crystalline, slightly alkaline, salty-tasting, water-soluble powder, KHCO 3 , produced by the passage of carbon dioxide through an aqueous potassium carbonate solution: used in cookery as a leavening agent and in medicine as an antacid.
- printed circuit board — a circuit in which the interconnecting conductors and some of the circuit components have been printed, etched, etc., onto a sheet or board of dielectric material (PC board, printed-circuit board)
- public address system — loudspeaker
- public health service — the agency that is responsible for the health of the general public
- public-address system — a combination of electronic devices that makes sound audible via loudspeakers to many people, as in an auditorium or out of doors.
- push the panic button — an alarm button for use in an emergency, as to summon help.
- put sb in their place — If you put someone in their place, you show them that they are less important or clever than they think they are.
- put someone's back up — to annoy someone
- reciprocal inhibition — the theory that the pairing of an anxiety-provoking stimulus with anxiety-reducing reactions will weaken the association between the stimulus and the anxiety.
- rectangular hyperbola — a hyperbola with perpendicular asymptotes
- saponification number — the number of milligrams of potassium hydroxide required to saponify one gram of a given ester, especially a glyceride.
- space shuttle orbiter — orbiter (def 1).
- spicebush swallowtail — a swallowtail butterfly, Papilio troilus, having a dark body with yellow spots on the forewings and greenish hind wings.
- splice the main brace — to join together or unite (two ropes or parts of a rope) by the interweaving of strands.
- stabilization-process — the act or process of stabilizing or the state of being stabilized.
- subliminal perception — perception of or reaction to a stimulus that occurs without awareness or consciousness
- sympathetic vibration — a vibration induced by resonance.
- the probation service — a criminal justice service that is mainly responsible for dealing with offenders by placing them under the supervision of a probation officer
- to be a hospital case — if you say that someone or something is a hospital case, you mean that they need urgent help because they are doing very badly
- trustee in bankruptcy — a person appointed by a court to administer the property of a bankrupt.
- writ of habeas corpus — law: petition for hearing
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