18-letter words containing u, r, b, a
- building materials — materials such as bricks, cement, timber, etc
- burkitt's lymphoma — a cancer characterized by tumors containing lymphoid cells, occurring esp. in children, in the jaw, eyes, and internal organs: it is associated with the Epstein-Barr virus
- bursa of fabricius — a lymphoid gland of the cloaca in birds, believed to function in disease resistance, and closing or disappearing as the bird ages.
- burst at the seams — to break, break open, or fly apart with sudden violence: The bitter cold caused the pipes to burst.
- butler's sideboard — a sideboard, often with a fall front, having on its top a china cabinet with glazed doors.
- butter-and-egg man — a prosperous businessman from a small town or a farmer who spends his money ostentatiously on visits to a big city.
- butterhead lettuce — a major group of lettuce varieties having soft, pliable leaves and small, loose heads, including bibb and Boston lettuce
- cabernet sauvignon — a black grape originally grown in the Bordeaux area of France, and now throughout the wine-producing world
- cambrian mountains — a mountain range in Wales, extending from Carmarthenshire in the S to Denbighshire in the N. Highest peak: Aran Fawddwy, 891 m (2970 ft)
- camel's-hair brush — an artist's small brush, made of hair from a squirrel's tail
- chambered nautilus — nautilus (def 1).
- character-building — improving certain good or useful traits in a person's character, esp self-reliance, endurance, and courage
- chlorofluorocarbon — Chlorofluorocarbons are the same as CFCs.
- circular breathing — a technique for sustaining a phrase on a wind instrument, using the cheeks to force air out of the mouth while breathing in through the nose
- claustrophobically — In a claustrophobic way.
- combination square — an adjustable device for carpenters, used as a try square, miter square, level, etc.
- combustion chamber — an enclosed space in which combustion takes place, such as the space above the piston in the cylinder head of an internal-combustion engine or the chambers in a gas turbine or rocket engine in which fuel and oxidant burn
- combustion furnace — a furnace used in the laboratory to carry out elemental analysis of organic compounds
- connected subgraph — (mathematics) A connected graph consisting of a subset of the nodes and edges of some other graph.
- cool as a cucumber — very calm; self-possessed
- corpus christi bay — a bay in S Texas, at the mouth of the Nueces River.
- cumberland plateau — division of the W Appalachians, extending from S W.Va. to N Ala.
- cumbrian mountains — a mountain range in NW England, in Cumbria. Highest peak: Scafell Pike, 977 m (3206 ft)
- de bruijn notation — (language) A variation of lambda notation for specifying functions using numbers instead of names to refer to formal parameters. A reference to a formal parameter is a number which gives the number of lambdas (written as \ here) between the reference and the lambda which binds the parameter. E.g. the function \ f . \ x . f x would be written \ . \ . 1 0. The 0 refers to the innermost lambda, the 1 to the next etc. The chief advantage of this notation is that it avoids the possibility of name capture and removes the need for alpha conversion.
- devil's paintbrush — a perennial European hawkweed (Hieracium aurantiacum) with leafless flower stalks bearing a cluster of orange-red heads: now a common weed in N U.S. and Canada
- diamondback turtle — any edible North American terrapin of the genus Malaclemys, esp M. terrapin, occurring in brackish and tidal waters and having diamond-shaped markings on the shell: family Emydidae
- distribution class — form class
- distribution ratio — the ratio of concentrations of a solute distributed between two immiscible solvents in contact with each other, as iodine in water and chloroform
- division of labour — a system of organizing the manufacture of an article in a series of separate specialized operations, each of which is carried out by a different worker or group of workers
- dominican republic — a republic in the West Indies, occupying the E part of the island of Hispaniola. 19,129 sq. mi. (49,545 sq. km). Capital: Santo Domingo.
- double-page spread — two pages treated as one in a publication, with images or text extending across the binding
- engelbart, douglas — Douglas Engelbart
- epstein-barr virus — a virus belonging to the herpes family that causes infectious mononucleosis; it is also implicated in the development of Burkitt's lymphoma and Hodgkin's disease
- established church — a Church that is officially recognized as a national institution, esp the Church of England
- fascicular cambium — cambium that develops within the vascular bundles, producing secondary xylem and phloem.
- fibrocartilaginous — a type of cartilage having a large number of fibers.
- football supporter — a person who supports a particular football team
- furnishing fabrics — fabrics used to make and cover furniture
- gabriele dannunzio — Gabriele [Italian gah-bree-e-le] /Italian ˌgɑ briˈɛ lɛ/ (Show IPA), (Duca Minimo) 1863–1938, Italian soldier, novelist, and poet.
- gamblers anonymous — an organization that holds group meetings to help people who are addicted to gambling
- gamma distribution — a continuous two-parameter distribution from which the chi-square and exponential distributions are derived, written Gamma (α. β), where α and β are greater than zero, and defined in terms of the gamma function
- gas-discharge tube — any tube in which an electric discharge takes place through a gas
- gettysburg address — the notable short speech made by President Lincoln on November 19, 1863, at the dedication of the national cemetery at Gettysburg, Pa.
- giuseppe garibaldi — Giuseppe [juh-sep-ee;; Italian joo-zep-pe] /dʒəˈsɛp i;; Italian dʒuˈzɛp pɛ/ (Show IPA), 1807–82, Italian patriot and general.
- grumbling appendix — a condition in which the appendix causes intermittent pain but appendicitis has not developed
- handlebar mustache — A handlebar mustache is a long thick mustache with curled ends.
- have money to burn — to have more money than one needs, so that some can be spent foolishly
- hawksbill (turtle) — a medium-sized marine turtle (Eretmochelys imbricata, family Cheloniidae) having a hawklike beak and a horny shell from which tortoise shell is obtained
- highbush cranberry — a shrub, Viburnum trilobum, of northern North America, having broad clusters of white flowers and edible scarlet berries.
- honourable mention — If something that you do in a competition is given an honourable mention, it receives special praise from the judges although it does not actually win a prize.