16-letter words containing r
- 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
- 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
- ad eundem gradum — to, of, or in the same rank or standing: pertaining to a university recognizing the academic credentials of a student transferring from another university by granting the student comparable status.
- adaptive routing — dynamic routing
- addition polymer — a polymer formed by the direct reaction of two or more monomers, and with no resulting water or other by-product.
- additive inverse — the number that must be added to a number to equal zero
- additive process — a photographic process in which the desired colours are produced by adding together appropriate proportions of three primary colours
- adhesive plaster — adhesive tape, especially in wide sheets.
- adirondack chair — a sturdy armchair for outdoor use, made of wide wooden slats, with a sloping back and a seat often slanting down toward it.
- 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.
- adjutant general — a member of the Army Board responsible for personnel and administrative functions
- administrational — the management of any office, business, or organization; direction.
- administratively — pertaining to administration; executive: administrative ability.
- administratrices — Plural form of administratrix.
- admirable bolete — an edible mushroom, Boletus mirabilis, of Rocky Mountain and Pacific northwestern evergreen forests, having a dark-red, scaly or woolly cap with yellow pores and a stout stem.
- 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
- adverbial phrase — a group of two or more words that function together as an adverb, as the phrase in a minute in I'll be with you in a minute.
- advisory opinion — an opinion given by a court on a case that does not settle the case but sets out the court's view of how the law or the constitution would apply to that case
- advisory teacher — a teacher who visits schools to advise teachers on curriculum developments within a particular subject area
- aerometeorograph — an aircraft instrument that records temperature, humidity, and atmospheric pressure
- 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
- affaire de coeur — an affair of the heart; love affair
- affirmative flag — a flag having five horizontal stripes, blue, white, red, white, and blue, from top to bottom, signifying “yes”: letter C in the International Code of Signals.
- african american — a black American of African descent.
- african elephant — a type of elephant that is native to Africa
- african honeybee — killer bee.
- african mahogany — any of several African trees of the meliaceous genus Khaya, esp K. ivorensis, that have wood similar to that of true mahogany
- african marigold — a tropical American plant, Tagetes erecta, cultivated for its yellow or orange flower heads and strongly scented foliage: family Asteraceae (composites)
- african wild dog — a mottled dog of Africa, Lycaon pictus
- african-american — African-Americans are black people living in the United States who are descended from families that originally came from Africa.
- african-canadian — a Canadian of African descent
- agency agreement — an agreement between a business and an agent appointed to promote its interests
- aggregate demand — the total demand for goods and services in an economy at a specified price level and in a specified time period
- aggregate supply — the total supply of goods and services produced by a national economy in a specified time period, at a specified price level
- agreed procedure — an official set of guidelines of the steps that should be followed in the event of a dispute between two parties, esp in arbitration between employee and employer
- agricultural ant — harvester ant.
- agustin iturbide — Agustín de [ah-goos-teen de] /ˌɑ gusˈtin dɛ/ (Show IPA), 1783–1824, Mexican soldier and revolutionary: as Agustín I, emperor of Mexico 1822–23.
- ai international — (company) One of distributors of Prolog++, subsumed by Customer Engagement Company before December 1998.
- air conditioning — Air conditioning is a method of providing buildings and vehicles with cool dry air.
- air vice-marshal — a senior Royal Air Force officer of equivalent rank to a rear admiral in the Royal Navy
- air-raid shelter — a structure, often located underground, that is designed to protect people during an air raid
- air-raid warning — an alarm that sounds to warn people when an air raid is expected
- aircraft carrier — An aircraft carrier is a warship with a long, flat deck where aircraft can take off and land.
- airmail envelope — an envelope made of the very thin blue paper that is used to send letters by airmail
- airplane carrier — an aircraft carrier.
- 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.