16-letter words containing a, c, t, i
- 3com corporation — (company, networking) A manufacturer of local area network equipment. 3Com was founded in 1979. They acquired BICC Data Networks in 1992, Star-Tek in 1993, Synernetics in 1993, Centrum in 1994, NiceCom in 1994 AccessWorks, Sonix Communications, Primary Access and Chipcom in 1995 and Axon and OnStream Networks in 1996. They merged with U.S. Robotics in 1997.
- abdominocentesis — (surgery) Extraction of peritoneal fluid from the abdomen for evaluation, using a trocar.
- absolute ceiling — the maximum height above sea level, usually measured in feet or metres, at which an aircraft can maintain horizontal flight
- abstract machine — 1. (language) A processor design which is not intended to be implemented as hardware, but which is the notional executor of a particular intermediate language (abstract machine language) used in a compiler or interpreter. An abstract machine has an instruction set, a register set and a model of memory. It may provide instructions which are closer to the language being compiled than any physical computer or it may be used to make the language implementation easier to port to other platforms. A virtual machine is an abstract machine for which an interpreter exists. Examples: ABC, Abstract Machine Notation, ALF, CAML, F-code, FP/M, Hermes, LOWL, Christmas, SDL, S-K reduction machine, SECD, Tbl, Tcode, TL0, WAM. 2. (theory) A procedure for executing a set of instructions in some formal language, possibly also taking in input data and producing output. Such abstract machines are not intended to be constructed as hardware but are used in thought experiments about computability. Examples: Finite State Machine, Turing Machine.
- academic costume — the ceremonial garb of the students and faculty in schools, colleges, and universities, consisting of a flat cap (mortarboard), a long, wide-sleeved gown, and sometimes a hood, worn especially at commencement exercises.
- acanthopterygian — of, relating to, or belonging to the Acanthopterygii, a large group of teleost fishes having spiny fin rays. The group includes most saltwater bony fishes
- accepted pairing — a technique of advertising in which two or more competing products are compared in such a manner that certain good qualities are conceded but one product is made to appear clearly more beneficial or desirable than its competitors.
- accidental death — death that was caused unintentionally
- accommodationism — A policy of being accommodating.
- accommodationist — a person who seeks to promote adaptation to or compromise with an opposing point of view
- accordion pleats — tiny knife pleats
- accountabilities — the state of being accountable, liable, or answerable.
- accrued interest — interest which has been earned since an investment was made or since a previous interest payment
- acculturationist — a person who studies the process of acculturation.
- accumulativeness — The state or qualities of being accumulative.
- acetic anhydride — a colourless pungent liquid used in the manufacture of cellulose and vinyl acetates for synthetic fabrics. Formula: (CH3CO)2O
- acetoacetic acid — a colorless, oily liquid, C 4 H 6 O 3 , soluble in water, alcohol, and ether: used in synthetic organic chemistry.
- acetyl promazine — acepromazine
- acetylene series — a group of similar hydrocarbons
- acetylsalicylate — a salt or ester of acetylsalicylic acid.
- achievement test — a test designed to measure the effects that learning and teaching have on individuals
- achromatic prism — a system of two or more prisms of different substances that deflects but does not disperse a beam of light.
- acid house party — a professionally organized party for young people, with Acid House music, sometimes held in a field or disused building
- acid metaprotein — a metaprotein derived by means of a hydrolytic acid.
- acoustic coupler — a device converting computer-data signals into acoustic form for transmission down a telephone line, through the handset microphone
- acoustic feature — any of the acoustic components or elements present in a speech sound and capable of being experimentally observed, recorded, and reproduced
- acoustic neuroma — a benign brain tumour of the vestibulocochlear nerve, one of the nerves connecting the ear to the brain, which can cause hearing and balance problems
- acoustic torpedo — a torpedo guided by sound that either emanates from the target or is emitted by the torpedo and bounces off the target.
- acoustical cloud — one of a number of acoustic panels installed near the ceiling of a concert hall to reflect sound for improving the acoustic quality of music.
- acquaintanceship — a person known to one, but usually not a close friend.
- acroparaesthesia — a persistent sensation of numbness and tingling in the hands and feet
- acrylic painting — a painting done with pigments in a solution of an acrylic resin: it dries quickly with a brilliance and depth comparable to those of both watercolor and oil paints
- act of indemnity — an act of Parliament granting exemption to public officers from technical penalties that they may have been compelled to incur
- actinobacillosis — a disease of cattle and sheep, caused by infection with an Actinobacillus lignieresii and characterized by soft tissue lesions, esp of the tongue
- actinodermatitis — dermatitis from exposure to radiation, esp ultraviolet light or X-rays
- actinopterygians — Plural form of actinopterygian.
- action committee — a group of people who come together to organize and supervise others who are fighting for a particular cause or carrying out a particular task
- action potential — a localized change in electrical potential, from about –70 mV to +30 mV and back again, that occurs across a nerve fibre during transmission of a nerve impulse
- activated carbon — a porous highly adsorptive form of carbon used to remove colour or impurities from liquids and gases, in the separation and extraction of chemical compounds, and in the recovery of solvents
- activated sludge — a mass of aerated precipitated sewage added to untreated sewage to bring about purification by hastening decomposition by microorganisms
- activation order — an instruction to create, mobilize, or organize a unit
- active directory — (operating system) A directory service from Microsoft Corporation, similar in concept to Novell Netware Directory Services, that also integrates with the user organisation's DNS structure and is interoperable with LDAP. Active Directory is included in Windows 2000.
- active transport — a process by which molecules are enabled to pass across a membrane from a region in which they are in a low concentration to one of high concentration; this requires the expenditure of energy in metabolism and is assisted by carrier proteins, commonly referred to as pumps
- activity holiday — a type of holiday in which holiday-makers can take part in many different organized activities, esp sports
- additive process — a photographic process in which the desired colours are produced by adding together appropriate proportions of three primary colours
- adjective clause — a relative clause that modifies a noun or pronoun, as the clause that I told you about in This is the book that I told you about and who saw us in It was she who saw us.
- adjective phrase — An adjective phrase or adjectival phrase is a group of words based on an adjective, such as 'very nice' or 'interested in football.' An adjective phrase can also consist simply of an adjective.
- adjustable-pitch — (of a marine or aircraft propeller) having blades whose pitch can be changed while the propeller is stationary, chiefly to suit various conditions of navigation or flight.
- administratrices — Plural form of administratrix.
- admitting office — an office in a hospital where administrative staff carry out the procedures necessary to admit a patient to the hospital
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