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16-letter words containing a, c, t

  • 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
  • add to the check — If you add an item or expense to the check at a restaurant or hotel, you put an extra charge onto a customer's bill to charge for an additional service they have used.
  • 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
  • adventure racing — a contest in which teams compete in an expedition-length race which involves two or more sporting disciplines, often running, mountain biking, climbing, kayaking, and elements of navigation and orienteering
  • advice columnist — An advice columnist is a person who writes a column in a newspaper or magazine in which they reply to readers who have written to them for advice on their personal problems.
  • advisory teacher — a teacher who visits schools to advise teachers on curriculum developments within a particular subject area
  • aerotherapeutics — the treatment of disease by the use of air, esp. by exposing patients to changes in atmospheric pressure
  • aesthetic labour — workers employed by a company for their appearance or accent, with the aim of promoting the company's image
  • aestheticisation — Act or process of aestheticising.
  • aestheticization — Alternative form of aestheticisation.
  • affectionateness — The state or quality of being affectionate.
  • affluent society — a society in which the material benefits of prosperity are widely available
  • african elephant — a type of elephant that is native to Africa
  • agency agreement — an agreement between a business and an agent appointed to promote its interests
  • agricultural ant — harvester ant.
  • air conditioning — Air conditioning is a method of providing buildings and vehicles with cool dry air.
  • aircraft carrier — An aircraft carrier is a warship with a long, flat deck where aircraft can take off and land.
  • alder flycatcher — a North American flycatcher, Empidonax alnorum, of alder thickets and other moist areas, that has greenish-brown upper parts and whitish underparts and is almost indistinguishable except by voice from E. traillii (willow flycatcher)
  • aleutian current — a current in the Pacific Ocean that flows eastward between latitudes 40° and 50° N.
  • alimentary canal — The alimentary canal in a person or animal is the passage in their body through which food passes from their mouth to their anus.
  • alligator wrench — a wrench having a V -shaped pair of serrated jaws set at right angles to the shank for turning cylindrical or irregularly shaped parts.
  • alloyed junction — a semiconductor junction used in some junction transistors and formed by alloying metal contacts, functioning as emitter and collector regions, to a wafer of semiconductor that acts as the base region
  • alpha-tocopherol — Alpha-tocopherol is a form of vitamin E.
  • alternative fact — a theory posited as an alternative to another, often more widely accepted, theory
  • alternative rock — a broad category of popular rock music typically regarded as somewhat out of the mainstream and variously including elements of punk rock, heavy metal, folk music, etc.
  • altitude chamber — a chamber for simulating the conditions of air pressure and temperature for a given altitude in order to test the behavior of people and equipment in such an environment.
  • aluminosilicates — Plural form of aluminosilicate.
  • aluminum acetate — a compound that in the form of its normal salt, Al(C 2 H 3 O 2) 3 , obtained as a white, water-soluble, amorphous powder, is used chiefly in medicine as an astringent and as an antiseptic, and in the form of its basic salt, Al(C 2 H 3 O 2) 2 OH, obtained as a white, crystalline, water-insoluble powder, is used chiefly in the textile industry as a waterproofing agent, as a fireproofing agent, and as a mordant.
  • ambulance stocks — high-performance stocks and shares recommended by a broker to a dissatisfied client to improve their relationship
  • amebic dysentery — a form of dysentery caused by an amoeba (Entamoeba histolytica)
  • american bittern — any of several tawny brown herons that inhabit reedy marshes, as Botaurus lentiginosus (American bittern) of North America, and B. stellaris, of Europe.
  • american kestrel — a small American falcon (Falco sparverius) with a reddish-brown back and tail; sparrow hawk
  • american mustard — a mild yellow mustard
  • american tragedy — a novel (1925) by Theodore Dreiser.
  • aminoacetic acid — glycine.
  • aminocitric acid — an amino acid, C 6 H 9 O 7 N, that is a component of calf thymus ribonucleoprotein.
  • ammonium acetate — a white, crystalline, deliquescent, water-soluble solid, NH 4 (C 2 H 3 O 2), used chiefly in the manufacture of dyes and meat preservatives.
  • ammonium cyanate — a white, crystalline solid, CH 4 N 2 O, soluble in alcohol, that is converted into urea when heated.
  • ammonium lactate — a colorless to yellow, water-soluble, syrupy liquid, C 3 H 9 NO 3 , used chiefly in electroplating.
  • ammunition pouch — a pouch for carrying ammunition
  • amusement arcade — An amusement arcade is a place where you can play games on machines which work when you put money in them.
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