15-letter words containing a, e, o
- acknowledgments — a section of text containing an author’s statement acknowledging his or her use of the works of other authors and thanking the people who have helped him or her, usually printed at the front of a book
- acoustic screen — a fabric-covered, double-sided screen used in open areas such as offices to absorb noise
- acoustical tile — tile made in various sizes and textures from soft, usually fibrous, sound-absorbing material, as wood, cork, or metal, and typically applied to ceilings or walls.
- acoustoelectric — electroacoustic.
- acrimoniousness — The quality of being resentful or cynical.
- acroanaesthesia — (pathology) Loss of sensation in the extremities.
- act of congress — a law that has been passed by both houses of the US Congress and signed by the president; if the president has chosen to veto the bill, it can be passed by a two-thirds majority in Congress
- actinochemistry — the branch of chemistry dealing with actinism; photochemistry.
- actinopterygian — belonging or pertaining to the Actinopterygii, a group of bony fishes.
- action reporter — a news reporter who reports to the public on matters of special interest to the consumer.
- active hydrogen — hydrogen in the form of single atoms, rather than molecules, which makes it extremely reactive.
- activity method — a type of teaching in which students acquire knowledge and understanding by participating in a set of specially designed activities, rather than by passively listening to a teacher
- adaptive optics — a technique used to increase the resolution of a ground-based astronomical telescope by counteracting the effects of the atmosphere on the image. A deforming mirror in the light path of the telescope maintains a pointlike image of the celestial body using either a real star or a laser beam as a reference
- addressing mode — 1. (processor, programming) One of a set of methods for specifying the operand(s) for a machine code instruction. Different processors vary greatly in the number of addressing modes they provide. The more complex modes described below can usually be replaced with a short sequence of instructions using only simpler modes. The most common modes are "register" - the operand is stored in a specified register; "absolute" - the operand is stored at a specified memory address; and "immediate" - the operand is contained within the instruction. Most processors also have indirect addressing modes, e.g. "register indirect", "memory indirect" where the specified register or memory location does not contain the operand but contains its address, known as the "effective address". For an absolute addressing mode, the effective address is contained within the instruction. Indirect addressing modes often have options for pre- or post- increment or decrement, meaning that the register or memory location containing the effective address is incremented or decremented by some amount (either fixed or also specified in the instruction), either before or after the instruction is executed. These are very useful for stacks and for accessing blocks of data. Other variations form the effective address by adding together one or more registers and one or more constants which may themselves be direct or indirect. Such complex addressing modes are designed to support access to multidimensional arrays and arrays of data structures. The addressing mode may be "implicit" - the location of the operand is obvious from the particular instruction. This would be the case for an instruction that modified a particular control register in the CPU or, in a stack based processor where operands are always on the top of the stack. 2. In IBM System 370/XA the addressing mode bit controls the size of the effective address generated. When this bit is zero, the CPU is in the 24-bit addressing mode, and 24 bit instruction and operand effective addresses are generated. When this bit is one, the CPU is in the 31-bit addressing mode, and 31-bit instruction and operand effective addresses are generated.
- adenocarcinomas — Plural form of adenocarcinoma.
- adenohypophysis — the anterior lobe of the pituitary gland
- adenoidectomies — Plural form of adenoidectomy.
- adhesive factor — the ratio of the force that can be exerted on driving wheels with full traction to the weight on the driving wheels, usually expressed as a percentage.
- adjective group — An adjective group or adjectival group is a group of words based on an adjective, such as 'very nice' or 'interested in football'. An adjective group can also consist simply of an adjective.
- adjectivization — Grammar. to make into an adjective, as by adding a suffix: The noun mirth can be adjectivized by adding -ful or -less to form the adjectives mirthful and mirthless.
- adlai stevenson — Adlai Ewing [ad-ley yoo-ing] /ˈæd leɪ ˈyu ɪŋ/ (Show IPA), 1835–1914, vice president of the U.S. 1893–97.
- admiralty house — the official residence of the Governor General of Australia, in Sydney
- adoption agency — an agency that matches children needing adoption with people willing to adopt
- adoption papers — documentation relating to the adoption of a particular child
- adrenalectomies — Plural form of adrenalectomy.
- adrenoreceptors — Plural form of adrenoreceptor.
- adult education — Adult education is education for adults in a variety of subjects, most of which are practical, not academic. Classes are often held in the evenings.
- advantage court — the receiver's left-hand service court, into which the ball is served when one side has the advantage.
- adventuresomely — In an adventuresome manner.
- adventurousness — the quality of being adventurous
- advocate depute — a Scottish law officer with the functions of public prosecutor
- aegyptopithecus — a genus of extinct anthropoid ape of the Oligocene Period known from remains found in Egypt.
- aerial pingpong — Australian Rules football
- aerobic dancing — a system of exercises combining aerobics with dance steps and usually done to music.
- aerodynamically — the branch of mechanics that deals with the motion of air and other gases and with the effects of such motion on bodies in the medium. Compare aerostatics (def 1).
- aerodynamicists — Plural form of aerodynamicist.
- aeroplane cloth — a strong fabric made from cotton, linen, and nylon yarns, used for some light aircraft fuselages and wings
- aerotitis media — temporary deafness and pain arising from traumatic inflammation of the middle ear, caused by a rapid change in barometric pressure, as a rise in ambient cabin pressure in an aircraft descending from high altitude for landing.
- affaire d'amour — a love affair
- affine geometry — the branch of geometry dealing with affine transformations.
- after a fashion — If you say that something was done after a fashion, you mean that it was done, but not very well.
- afternoon watch — the watch from noon until 4 p.m.
- age of aquarius — an astrological era believed to bring increased spirituality and harmony on earth.
- age-appropriate — Something that is age-appropriate is suitable for the age that a person is.
- aggregate score — a score calculated by adding the results of several matches
- agree to differ — to end an argument amicably while maintaining differences of opinion
- air conditioned — If a room or vehicle is air conditioned, the air in it is kept cool and dry by means of a special machine.
- air conditioner — An air conditioner is a machine which keeps the air in a building cool and dry.
- air force cross — a U.S. Air Force decoration awarded for extraordinary heroism in action
- air-superiority — designating a fighter aircraft built for long patrol capability at high altitudes and supersonic speeds, with air-to-air combat as its principal mission.