19-letter words containing a, t, b, r
- observation balloon — a balloon that is used for gathering information and reconnaissance purposes and spotting aircraft
- okeechobee waterway — a waterway in S Florida from the Atlantic Ocean to the Gulf of Mexico. 155 miles (244 km) long.
- olive-backed thrush — Swainson's thrush.
- on the baker's list — in good health
- on-the-job training — apprenticeship, learning by doing
- optical double star — two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together and comprise a single physical system (physical double star)
- oxyacetylene burner — a blowpipe for cutting or welding metals at high temperatures
- palomar observatory — an astronomical observatory situated on Palomar Mountain in S California, having a 200-inch (508-cm) reflecting telescope and a 48-inch (122-cm) Schmidt telescope.
- pancreatic fibrosis — cystic fibrosis.
- parliament building — structure housing legislative offices
- party-column ballot — Indiana ballot.
- patrol torpedo boat — PT boat.
- perfoliate bellwort — a slender plant, Uvularia perfoliata, of the lily family, of eastern North America, having pale yellow, bell-shaped flowers.
- peridental membrane — periodontal membrane.
- perpetual debenture — a bond or debenture that can either never be redeemed or cannot be redeemed on demand
- phenylthiocarbamide — a crystalline, slightly water-soluble solid, C 6 H 5 NHCSNH 2 , that is either tasteless or bitter, depending upon the heredity of the taster, and is used in medical genetics and as a diagnostic.
- pointe-aux-trembles — a city in S Quebec, in E Canada, N of Montreal, on the St. Lawrence.
- potassium carbonate — a white, granular, water-soluble powder, K 2 CO 3 , used chiefly in the manufacture of soap, glass, and potassium salts.
- predicate objective — objective complement.
- profitability study — a study of how much profit a company, organization, etc, makes or how profitable it is
- protease inhibitors — a drug that inhibits the action of protease, especially any of a class of antiviral drugs that prevent the cleavage and replication of HIV proteins.
- public-interest law — a branch of law that often utilizes class-action suits to protect the interest of a large group or of the public at large, as in matters relating to racial discrimination, air pollution, etc.
- rag-tag and bobtail — the riffraff; rabble: The ragtag and bobtail of every nation poured into the frontier in search of gold.
- rebus sic stantibus — (of the duration of the binding force treaty) for as long as the relevant facts and circumstances remain basically the same.
- redress the balance — to make a fair adjustment; see that justice is done
- registered disabled — on a local authority register under the Chronically Sick and Disabled Persons Act 1970
- registration number — number on vehicle licence plate
- relational database — an electronic database comprising multiple files of related information, usually stored in tables of rows (records) and columns (fields), and allowing a link to be established between separate files that have a matching field, as a column of invoice numbers, so that the two files can be queried simultaneously by the user.
- removable cartridge — a hard disk enclosed in a case that can be removed from the disk drive, having more storage than floppy disks.
- republic of vietnam — the name (from 1955–75) for South Vietnam, as an independent republic, following the division of the country in 1954 into North Vietnam and South Vietnam
- research laboratory — place for scientific experimentation
- reversible reaction — a reaction that, depending on ambient conditions, can proceed in either of two directions: the production of the reaction products from the reactants, or the production of the original reactants from the formed reaction products. Compare equilibrium (def 4).
- saber-toothed tiger — any of several extinct members of the cat family Felidae from the Oligocene to Pleistocene Epochs, having greatly elongated, saberlike upper canine teeth.
- sabre-toothed tiger — any of various extinct Tertiary felines of the genus Smilodon and related genera, with long curved upper canine teeth
- saddle-billed stork — a large stork, Ephippiorhynchus senegalensis, of West Africa, having a white and black body and a long, red and black bill.
- sb's spiritual home — your spiritual home is the place where you feel that you belong, usually because your ideas or attitudes are the same as those of the people who live there
- seat belt tensioner — A seat belt tensioner is a device in a vehicle that pulls a seat belt tight if there is a sudden movement or stop.
- semidetached binary — a pair of stars that are so close together that mass transfer occurs from one to the other
- short-tail business — Short-tail business is insurance business where it is known that claims will be made and settled quickly.
- shortness of breath — respiratory difficulty
- siberian forest cat — a breed of powerfully-built long-haired cat, typically tabby with a white ruff and white paws
- simple carbohydrate — a carbohydrate, as glucose, that consists of a single monosaccharide unit.
- southern crab apple — a tree, Malus angustifolia, of the eastern U.S., having oblong leaves, fragrant, pink or rose-colored flowers, and small, round, yellow-green fruit.
- spin quantum number — the quantum number that designates the total angular momentum associated with electron spin and has a value of ½ in units of h /2π.
- stabilization print — a print made by the stabilization process.
- standing broad jump — a jump for distance from a standing position.
- stanford-binet test — a revised version of the Binet-Simon scale, prepared at Stanford University for use in the U.S.
- starve the bardies! — an exclamation of surprise or protest
- stationery cupboard — a cupboard where things like paper, pens and paper clips are kept
- stochastic variable — a random variable.