19-letter words containing a, b, p, t
- absolute complement — complement (def 8).
- absolute impediment — a fact or circumstance that disqualifies a person from lawful marriage.
- absorption spectrum — the characteristic pattern of dark lines or bands that occurs when electromagnetic radiation is passed through an absorbing medium into a spectroscope. An equivalent pattern occurs as coloured lines or bands in the emission spectrum of that medium
- algebraic data type — (programming) (Or "sum of products type") In functional programming, new types can be defined, each of which has one or more constructors. Such a type is known as an algebraic data type. E.g. in Haskell we can define a new type, "Tree": data Tree = Empty | Leaf Int | Node Tree Tree with constructors "Empty", "Leaf" and "Node". The constructors can be used much like functions in that they can be (partially) applied to arguments of the appropriate type. For example, the Leaf constructor has the functional type Int -> Tree. A constructor application cannot be reduced (evaluated) like a function application though since it is already in normal form. Functions which operate on algebraic data types can be defined using pattern matching: depth :: Tree -> Int depth Empty = 0 depth (Leaf n) = 1 depth (Node l r) = 1 + max (depth l) (depth r) The most common algebraic data type is the list which has constructors Nil and Cons, written in Haskell using the special syntax "[]" for Nil and infix ":" for Cons. Special cases of algebraic types are product types (only one constructor) and enumeration types (many constructors with no arguments). Algebraic types are one kind of constructed type (i.e. a type formed by combining other types). An algebraic data type may also be an abstract data type (ADT) if it is exported from a module without its constructors. Objects of such a type can only be manipulated using functions defined in the same module as the type itself. In set theory the equivalent of an algebraic data type is a discriminated union - a set whose elements consist of a tag (equivalent to a constructor) and an object of a type corresponding to the tag (equivalent to the constructor arguments).
- algebraic operation — any of the mathematical operations of addition, subtraction, multiplication, division, raising to a power, or extraction of a root.
- all-points bulletin — An all-points bulletin is a message sent by a police force to all its officers. The abbreviation APB is also used.
- alphabetic language — (human language) A written human language in which symbols reflect the pronunciation of the words. Examples are English, Greek, Russian, Thai, Arabic and Hebrew. Alphabetic languages contrast with ideographic languages.
- ambient temperature — Ambient temperature is the temperature of the air surrounding a component.
- anti-prohibitionist — a person who favors or advocates prohibition.
- anticipatory breach — a declaration by one party to a contract that it does not intend to fulfil its obligations to the second party, who can then accept this declaration and choose not to be bound by the contract
- appetitive behavior — activity that increases the likelihood of satisfying a specific need, as restless searching for food by a hungry predator (distinguished from consummatory behavior).
- appointments bureau — an office responsible for filling appointments
- atmospheric braking — a technique of reentry in which the vehicle is maneuvered in the upper atmosphere so as to lose velocity by utilizing drag without overheating.
- backward compatible — backward compatibility
- bacteriochlorophyll — a pale blue-gray form of chlorophyll that is unique to the photosynthetic but anaerobic purple bacteria.
- balance of payments — A country's balance of payments is the difference, over a period of time, between the payments it makes to other countries for imports and the payments it receives from other countries for exports.
- ballistocardiograph — an instrument that records the slight recoil of the body, while on a special bed, caused by the contractions of the heart: used to measure cardiac pumping power and the elasticity of the aorta
- balloon angioplasty — angioplasty in which a balloon catheter is moved to a blocked area of a blood vessel where the balloon is inflated to expand or force open the vessel
- banff national park — a national reserve, 2585 sq. mi. (6695 sq. km), in the Rocky Mountains, in SW Alberta, Canada.
- banker's acceptance — a draft or bill of exchange drawn on a bank and accepted by it
- bankruptcy petition — an official request for protection under bankruptcy laws, which initiates bankruptcy proceedings
- bargaining position — the position of a person, group, or organization in a negotiation, with respect to their ability to achieve a deal which is favourable to themselves
- barometric pressure — atmospheric pressure as indicated by a barometer
- be burnt to a crisp — If something is burnt to a crisp, it is completely burnt.
- beauty preparations — the cosmetics, creams etc used to improve someone's beauty
- benefit performance — a theatrical or musical performance in aid of charity
- beta-naphthyl group — See under naphthyl.
- bill of particulars — an itemized statement of claims or counterclaims provided to the opposing party of a lawsuit
- binocular disparity — the small differences in the positions of the parts of the images falling on each eye that results when each eye views the scene from a slightly different position; these differences make stereoscopic vision possible
- binomial experiment — an experiment consisting of a fixed number of independent trials each with two possible outcomes, success and failure, and the same probability of success. The probability of a given number of successes is described by a binominal distribution
- bit-paired keyboard — (hardware) (Obsolete, or "bit-shift keyboard") A non-standard keyboard layout that seems to have originated with the Teletype ASR-33 and remained common for several years on early computer equipment. The ASR-33 was a mechanical device (see EOU), so the only way to generate the character codes from keystrokes was by some physical linkage. The design of the ASR-33 assigned each character key a basic pattern that could be modified by flipping bits if the SHIFT or the CTRL key was pressed. In order to avoid making the thing more of a Rube Goldberg kluge than it already was, the design had to group characters that shared the same basic bit pattern on one key. Looking at the ASCII chart, we find: high low bits bits 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 010 ! " # $ % & ' ( ) 011 0 1 2 3 4 5 6 7 8 9 This is why the characters !"#$%&'() appear where they do on a Teletype (thankfully, they didn't use shift-0 for space). This was *not* the weirdest variant of the QWERTY layout widely seen, by the way; that prize should probably go to one of several (differing) arrangements on IBM's even clunkier 026 and 029 card punches. When electronic terminals became popular, in the early 1970s, there was no agreement in the industry over how the keyboards should be laid out. Some vendors opted to emulate the Teletype keyboard, while others used the flexibility of electronic circuitry to make their product look like an office typewriter. These alternatives became known as "bit-paired" and "typewriter-paired" keyboards. To a hacker, the bit-paired keyboard seemed far more logical - and because most hackers in those days had never learned to touch-type, there was little pressure from the pioneering users to adapt keyboards to the typewriter standard. The doom of the bit-paired keyboard was the large-scale introduction of the computer terminal into the normal office environment, where out-and-out technophobes were expected to use the equipment. The "typewriter-paired" standard became universal, "bit-paired" hardware was quickly junked or relegated to dusty corners, and both terms passed into disuse.
- black carpenter ant — a large, black ant, Camponotus pennsylvanicus, that lives in damp wood in nature or in houses, where it can cause considerable damage by boring or tunneling.
- black 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)
- blackstrap molasses — the molasses remaining after the maximum quantity of sugar has been extracted from the raw material
- blast from the past — You can use a blast from the past as a light-hearted way of referring to something such as an old song or fashion that you hear or notice again, and which reminds you of an earlier time.
- breach of the peace — A breach of the peace is noisy or violent behaviour in a public place which is illegal because it disturbs other people.
- breathing apparatus — an apparatus, usually consisting of tanks of air or oxygen and a mouthpiece, that enables the wearer to breath in difficult conditions such as a smoke-filled building
- brush-tailed possum — any of several widely-distributed Australian possums of the genus Trichosurus
- by one's bootstraps — by one's own efforts; unaided
- canterbury pilgrims — the pilgrims whose stories are told in Chaucer's Canterbury Tales
- captain abstraction — The champion of the principles of abstraction and modularity, who protects unwary students on MIT's course 6.001 from the nefarious designs of Sergeant Spaghetticode and his vile concrete programming practices. See also spaghetti code.
- carbon steel piping — Carbon steel piping is pipes made of steel with carbon as the main alloying component, used for transporting fluids.
- chamber of deputies — the lower house of the legislature of certain countries, as Italy.
- combination therapy — a therapy that combines two or more drugs, or two or more treatments
- creeping bent grass — a grass, Agrostis stolonifera, grown as a pasture grass in Europe and North America: roots readily from the stem
- cuboidal epithelium — epithelium consisting of one or more layers of cells of cuboid or polyhedral shape.
- department of labor — the department of the U.S. federal government that promotes and improves the welfare, opportunities, and working conditions of wage earners. Abbreviation: DOL.
- dependable software — software reliability
- differential backup — (operating system) A kind of backup that copies all files that have changed since the last full backup. Each differential backup will include all files in previous differential backups since the full backup so to restore a version of a file, you only need to search the full backup and the relevant differential backup. Some systems support differential backup by associating an "Archive" flag with each file and setting this flag whenever the file is modified to indicate that it should be included in the next backup. A differential backup does not change this flag, whereas an incremental backup resets it.
- disambiguation page — a page on a website that lists various websites or web pages that have or could have the same title. The user is able to select from the list that page, site etc that he or she actually wants
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