16-letter words containing r, i
- 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
- 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
- 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.
- aleutian current — a current in the Pacific Ocean that flows eastward between latitudes 40° and 50° N.
- alexander baring — Alexander, 1st Baron Ashburton, 1774–1848, British statesman.
- alexander island — island of Antarctica, just west of the base of the Antarctic Peninsula, in the British Antarctic Territory: c. 16,700 sq mi (43,253 sq km)
- alexander nevski — Saint. ?1220–63, Russian prince and military leader, who defeated the Swedes at the River Neva (1240) and the Teutonic knights at Lake Peipus (1242)
- alexandria senna — See under senna (def 2).
- algebraic number — any number that is a root of a polynomial equation having rational coefficients such as √2 but not π
- algol 60 revised — (language) (Or "Revised ALGOL 60") A revision of Algol 60 which still lacked standard I/O.
- algol 68 revised — (language) A significant simplification of ALGOL 68.
- 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.
- alizarin crimson — a pigment used in painting, derived from anthraquinone and characterized by its red color and transparency.
- all-terrain bike — mountain bike. Abbreviation: ATB.
- alligator lizard — any of several lizards of the genera Algaria and Gerrhonotus, of western North America, having shinglelike scales and a fold along each side that permits expansion.
- alligator pepper — a tropical African zingiberaceous plant, Amomum melegueta, having red or orange spicy seed capsules
- 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.
- alliterativeness — The state or quality of being alliterative.
- alpha conversion — (theory) In lambda-calculus and reduction, the renaming of a formal parameter in a lambda abstraction. This does not change the meaning of the abstraction. For example: \ x . x+1 <--> \ y . y+1 If the actual argument to a lambda abstraction contains instances of the abstraction's formal parameter then it is necessary to rename the parameter before applying the abstraction to avoid name capture.
- alpha-adrenergic — of or having to do with an alpha receptor
- alpha-interferon — interferon (def 2).
- alphanumerically — In an alphanumeric manner; using alphanumeric characters.
- alpine bearberry — a related species, A. alpina of European mountains, having black berries
- alternative fact — a theory posited as an alternative to another, often more widely accepted, theory
- alternative fuel — An alternative fuel is any automotive fuel other than gasoline and diesel fuel.
- 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.
- alternative vote — of or relating to a system of voting in which voters list the candidates in order of preference. If no candidate obtains more than 50% of first-preference votes, the votes for the bottom candidate are redistributed according to the voters' next preference
- 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.