19-letter words containing o, r, n
- at a (or one) blow — by one action
- at one's discretion — as one wishes
- at one's fingertips — readily available and within one's mental grasp
- at your convenience — at a time suitable to you
- atherton technology — (company) The comapny that developed the Software BackPlane CASE framework. Their Atherton Tool Integration Services were the basis for the ATIS standard.
- atmospheric braking — a technique of reentry in which the vehicle is maneuvered in the upper atmosphere so as to lose velocity by utilizing drag without overheating.
- atrial fibrillation — a local and uncontrollable twitching of muscle fibres that results in rapid and irregular heart and pulse rate
- attachment disorder — an emotional and behavioral disorder arising from a failure to form a strong bond with one’s primary caregiver in early childhood and affecting one’s social relationships in later childhood and adulthood. See also attachment (def 3a).
- audio response unit — a device that enables a computer to give a spoken response by generating sounds similar to human speech.
- augsburg confession — the statement of beliefs and doctrines of the Lutherans, formulated by Melanchthon and endorsed by the Lutheran princes, which was presented at the Diet of Augsburg in 1530 and which became the chief creed of the Lutheran Church.
- auriculoventricular — atrioventricular.
- austro-prussian war — the war (1866) in which Prussia, Italy, and some minor German states opposed Austria, Saxony, Hanover, and the states of southern Germany.
- author's alteration — a correction or change made in typeset copy that is not a correction of an error introduced by the compositor. Abbreviation: AA, A.A., a.a., aa.
- autotransplantation — autograft.
- ave regina coelorum — a Latin hymn in honor of the Virgin Mary as Queen of Heaven.
- avogadro's constant — the number of atoms or molecules in a mole of a substance, equal to 6.022 52 × 1023
- awareness programme — a programme designed to increase awareness of something
- baader-meinhof gang — a group of left-wing West German terrorists, active in the 1970s, who were dedicated to the violent overthrow of capitalist society
- bachelor of science — A Bachelor of Science is a first degree in a science subject. In British English, it can also mean a person with that degree. The abbreviation BSc or , BSc is also used.
- baja california sur — a state of NW Mexico, in the S part of the Lower California peninsula. Capital: La Paz. Pop: 423 516 (2000). Area: 73 475 sq km (28 363 sq miles)
- balfour declaration — the statement made by Arthur Balfour in 1917 of British support for the setting up of a national home for the Jews in Palestine, provided that the rights of "existing non-Jewish communities" in Palestine could be safeguarded
- banff national park — a national reserve, 2585 sq. mi. (6695 sq. km), in the Rocky Mountains, in SW Alberta, Canada.
- bang for one's buck — value for money
- bank reconciliation — A bank reconciliation is the process of adjusting a bank statement to show transactions that have occurred since the date of issue, or a document showing this.
- bankruptcy petition — an official request for protection under bankruptcy laws, which initiates bankruptcy proceedings
- bargaining position — the position of a person, group, or organization in a negotiation, with respect to their ability to achieve a deal which is favourable to themselves
- barometric gradient — pressure gradient
- battle-ground state — a state of the U.S. in which the Democratic and Republican candidates both have a good chance of winning and that is considered key to the outcome of a presidential election: the swing states of Ohio and Indiana.
- battles of bull run — two battles fought at Manassas Junction near a stream named Bull Run, during the American Civil War (July, 1861 and August, 1862), in both of which the Federal army was routed by the Confederates
- bbc networking club — (body) A bulletin board run by the British Broadcasting Corporation Education department from April 1994 to 30 Nov 1995.
- be burnt to a crisp — If something is burnt to a crisp, it is completely burnt.
- be greek to someone — to be incomprehensible or unintelligible to someone
- be one's own master — If you say that you are your own master, you mean that your decisions are not controlled by other people and you are free to do what you want.
- be one's own person — a human being, whether an adult or child: The table seats four persons.
- be someone's junior — to be younger than someone
- beauty preparations — the cosmetics, creams etc used to improve someone's beauty
- beggar-my-neighbour — a card game in which one player tries to win all the cards of the other player
- beginning inventory — A beginning inventory is all of the goods, services, or materials that a business has available for use or sale at the start of a new accounting period.
- behavioral genetics — an interdisciplinary field studying the effects of genetics and hereditary factors on animal and human behavior.
- behavioral medicine — an interdisciplinary field that uses the concepts and techniques of the behavioral sciences to improve physical and emotional health.
- behavioural science — the application of scientific methods to the study of the behaviour of organisms
- behind closed doors — If people have talks and discussions behind closed doors, they have them in private because they want them to be kept secret.
- bellybutton surgery — laparoscopy.
- below par/under par — If you feel below par or under par, you feel tired and unable to perform as well as you normally do.
- bend over backwards — to make a special effort, esp in order to please
- benefit performance — a theatrical or musical performance in aid of charity
- bernoulli principle — (Or "air foil principle", after Swiss mathematician Daniel Bernoulli, 1700-1782) The law that pressure in a fluid decreases with the rate of flow. It has been applied to a class of hard disk drives. See Bernoulli Box.
- bernoulli's theorem — Statistics. law of averages (def 1).
- bernstein condition — (parallel) Processes cannot execute in parallel if one effects values used by the other. Nor can they execute in parallel if any subsequent process uses data effected by both, i.e. whose value might depend on the order of execution.
- beta-naphthyl group — See under naphthyl.