18-letter words containing a, n, c, y
- acadian flycatcher — a small, greenish tyrant flycatcher (Empidonax virescens) found in deciduous forests of E North America
- according to hoyle — according to the rules and regulations; in the prescribed, fair, or correct way
- accretionary wedge — a body of deformed sediments, wedge-shaped in two dimensions or prism-shaped in three dimensions, that has been scraped off the surface of the oceanic lithosphere as it moves downwards beneath a continent or island arc. The sediments are added to the continental edge
- 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
- african yellowwood — a tree, Podocarpus elongatus, of tropical Africa and the mountains of southern Africa, having globe-shaped fruit, grown as an ornamental.
- alternative comedy — a style of comedy originating in the UK in the 1980s that seeks to avoid racist or sexist stereotypes, and usually puts forward left-wing, anti-establishment views
- aluminum glycinate — a white, bland-tasting powder, C 2 H 6 AlNO 4 , that is used as an antacid.
- american cranberry — See under cranberry (def 1).
- analytical balance — a precision balance having a sensitivity of 0.1 milligram.
- analytical machine — Analytical Engine
- analytical reagent — a chemical compound of a known high standard of purity
- anaphylactic shock — a severe, sometimes fatal, reaction to a substance to which a person has an extreme sensitivity, often involving respiratory difficulty and circulation failure
- anthropocentricity — the state or quality of being anthropocentric.
- anti-masonic party — a former political party (1826–35) that opposed Freemasonry in civil affairs.
- antifriction alloy — a metallic alloy, as Babbitt metal or bearing bronze, having antifriction qualities.
- army of occupation — an army that goes into a defeated country to enforce peace terms, keep order, etc.
- associated company — a company which is largely controlled by its parent company because the latter owns anything up to 50% of the shares
- astrometric binary — a binary star that can be recognized as such because of its undulating proper motion.
- 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.
- auditory phonetics — the branch of phonetics concerned with the perception of speech sounds by humans
- be in good company — If you say that someone is in good company, you mean that they should not be ashamed of a mistake or opinion, because some important or respected people have made the same mistake or have the same opinion.
- beauty competition — a competition in which the participants, usually women, are judged on their attractiveness, with a prize, and often a title, awarded to the winner
- benzyl thiocyanate — a colorless, crystalline, water-insoluble solid, C 8 H 7 NS, used as an insecticide.
- boundary condition — a stated restriction, usually in the form of an equation, that limits the possible solutions to a differential equation.
- 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.
- 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
- carbonic-anhydride — carbon dioxide.
- carboxyhaemoglobin — haemoglobin coordinated with carbon monoxide, formed as a result of carbon monoxide poisoning. As carbon monoxide is bound in preference to oxygen, tissues are deprived of oxygen
- 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.
- catalytic cracking — a method used in the petroleum industry for the cracking of petroleum by catalysis
- catcher in the rye — a novel (1951) by J. D. Salinger.
- chebyshev equation — Tchebycheff equation.
- chemical pregnancy — a pregnancy that is confirmed by a pregnancy test but not by clinical signs and terminates before clinical signs can be observed.
- chronostratigraphy — The branch of geology concerned with establishing the absolute ages of strata.
- clay-colored robin — any of several small Old World birds having a red or reddish breast, especially Erithacus rubecula, of Europe.
- climbing hydrangea — a woody vine, Hydrangea anomala, of eastern Asia, having shiny, egg-shaped leaves and flat-topped white flower clusters, and climbing by aerial rootlets.
- clinical pathology — the branch of pathology dealing with the study of disease and disease processes by means of chemical, microscopic, and serologic examinations.
- color transparency — a positive color image photographically produced on transparent film or glass and viewed by transmitted light, usually by projection.
- come someone's way — to come within someone's scope or range; come to someone
- commodity exchange — an exchange where commodities are traded
- community hospital — (in the US) a local hospital
- community language — a language spoken by members of a minority group or community within a majority language context
- 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.
- complementary gene — one of a pair of genes, each from different loci, that together are required for the expression of a certain characteristic
- conductivity water — water that has a conductivity of less than 0.043 × 10–6 S cm–1
- conservative party — The Conservative Party is the main right-of-centre party in Britain.
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