18-letter words containing a, y, r, s
- (in) the worst way — very much; greatly
- abstract data type — (programming) (ADT) A kind of data abstraction where a type's internal form is hidden behind a set of access functions. Values of the type are created and inspected only by calls to the access functions. This allows the implementation of the type to be changed without requiring any changes outside the module in which it is defined. A classic example of an ADT is a stack data type for which functions might be provided to create an empty stack, to push values onto a stack and to pop values from a stack.
- advertising agency — An advertising agency is a company whose business is to create advertisements for other companies or organizations.
- aerothermodynamics — the study of the exchange of heat between solids and gases, esp of the heating effect on aircraft flying through the air at very high speeds
- andrew file system — (operating system, storage) (AFS) The distributed file system of the Andrew Project, adopted by the OSF as part of their Distributed Computing Environment.
- anniversary dinner — a dinner held to celebrate an event that occurred in some previous year
- anthropomorphously — In an anthropomorphous manner; in a manner resembling that of a human.
- anti-masonic party — a former political party (1826–35) that opposed Freemasonry in civil affairs.
- aperture synthesis — an array of radio telescopes used in radio astronomy to simulate a single large-aperture telescope. Some such instruments use movable dishes while others use fixed dishes
- apocryphal gospels — accounts of Christ's life that are not recognized as part of the New Testament
- apparent solar day — the period of time between two successive passages of the sun's center across the same meridian.
- associative memory — content addressable memory
- astrometric binary — a binary star that can be recognized as such because of its undulating proper motion.
- asymmetric warfare — warfare in which opposing groups or nations have unequal military resources, and the weaker opponent uses unconventional weapons and tactics, as terrorism, to exploit the vulnerabilities of the enemy.
- asymptotic freedom — a property of the force between quarks, according to quantum chromodynamics, such that they behave almost like free particles when they are close together within a hadron.
- asynchronous logic — (architecture) A data-driven circuit design technique where, instead of the components sharing a common clock and exchanging data on clock edges, data is passed on as soon as it is available. This removes the need to distribute a common clock signal throughout the circuit with acceptable clock skew. It also helps to reduce power dissipation in CMOS circuits because gates only switch when they are doing useful work rather than on every clock edge. There are many kinds of asynchronous logic. Data signals may use either "dual rail encoding" or "data bundling". Each dual rail encoded Boolean is implemented as two wires. This allows the value and the timing information to be communicated for each data bit. Bundled data has one wire for each data bit and another for timing. Level sensitive circuits typically represent a logic one by a high voltage and a logic zero by a low voltage whereas transition signalling uses a change in the signal level to convey information. A speed independent design is tolerant to variations in gate speeds but not to propagation delays in wires; a delay insensitive circuit is tolerant to variations in wire delays as well. The purest form of circuit is delay-insensitive and uses dual-rail encoding with transition signalling. A transition on one wire indicates the arrival of a zero, a transition on the other the arrival of a one. The levels on the wires are of no significance. Such an approach enables the design of fully delay-insensitive circuits and automatic layout as the delays introduced by the layout compiler can't affect the functionality (only the performance). Level sensitive designs can use simpler, stateless logic gates but require a "return to zero" phase in each transition.
- at your fingertips — If you say that something is at your fingertips, you approve of the fact that you can reach it easily or that it is easily available to you.
- auditory phonetics — the branch of phonetics concerned with the perception of speech sounds by humans
- barrow's goldeneye — See under goldeneye (def 1).
- bats-in-the-belfry — a hairy Eurasian campanulaceous plant, Campanula trachelium, with bell-shaped blue-purple flowers
- bilateral symmetry — the property of an organism or part of an organism such that, if cut in only one plane, the two cut halves are mirror images of each other
- biz-core stability — (security) Internet security products which secure the business core.
- bounty-fed farmers — farmers who benefit from subsidies
- breach of security — an act that violates a country, area, or building's security measures
- break your silence — If someone breaks their silence about something, they talk about something that they have not talked about before or for a long time.
- bring-and-buy sale — A bring-and-buy sale is an informal sale to raise money for a charity or other organization. People who come to the sale bring things to be sold and buy things that other people have brought.
- burkitt's lymphoma — a cancer characterized by tumors containing lymphoid cells, occurring esp. in children, in the jaw, eyes, and internal organs: it is associated with the Epstein-Barr virus
- by fits and starts — spasmodically; without concerted effort
- california rosebay — a Pacific coast shrub or tree (Rhododendron californicum) of the heath family, with rosy or purplish flowers
- carbonic anhydrase — an enzyme in blood cells that catalyses the decomposition of carbonic acid into carbon dioxide and water, facilitating the transport of carbon dioxide from the tissues to the lungs
- carcinoid syndrome — the systemic effects, including flushing, palpitations, diarrhea, and cramps, resulting from increased blood levels of serotonin secreted by a carcinoid.
- casualty insurance — insurance providing coverage against accident and property damages, as automobile, theft, liability, and explosion insurance, but not including life insurance, fire insurance, or marine insurance.
- cat's cry syndrome — a complex of congenital malformations in human infants caused by a chromosomal aberration and in which the infant emits a mewing cry.
- catastrophe theory — a mathematical theory that classifies surfaces according to their form
- characteristically — Also, characteristical. pertaining to, constituting, or indicating the character or peculiar quality of a person or thing; typical; distinctive: Red and gold are the characteristic colors of autumn.
- chartered surveyor — (in Britain) a surveyor who is registered with the Royal Institution of Chartered Surveyors as having the qualifications, training, and experience to satisfy their professional requirements
- chronostratigraphy — The branch of geology concerned with establishing the absolute ages of strata.
- circulatory system — the system concerned with the transport of blood and lymph, consisting of the heart, blood vessels, lymph vessels, etc
- claustrophobically — In a claustrophobic way.
- color transparency — a positive color image photographically produced on transparent film or glass and viewed by transmitted light, usually by projection.
- complementary base — either of the nucleotide bases linked by a hydrogen bond on opposite strands of DNA or double-stranded RNA: guanine is the complementary base of cytosine, and adenine is the complementary base of thymine in DNA and of uracil in RNA.
- complexity measure — (algorithm) A quantity describing the complexity of a computation.
- conservative party — The Conservative Party is the main right-of-centre party in Britain.
- constituency party — a branch of a political party operating within a constituency
- coronary occlusion — partial or total obstruction of a coronary artery, as by a thrombus, usually resulting in infarction of the myocardium.
- corpus christi bay — a bay in S Texas, at the mouth of the Nueces River.
- corpuscular theory — the theory, originally proposed by Newton, and revived with the development of the quantum theory, that light consists of a stream of particles
- cot death syndrome — the unexplained sudden death of an infant during sleep
- countryside agency — (in England) a government agency that promotes the conservation and enjoyment of the countryside and aims to stimulate employment in rural areas
- cranial osteopathy — osteopathy that focuses on the cranium and the spine
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