13-letter words containing a, d, i, r, o
- astrodynamics — the study of the motion of natural and artificial bodies in space
- aten asteroid — one of a small group of asteroids whose orbits cross that of the earth and whose semimajor axes are smaller than that of the earth.
- audience room — a room for holding formal interviews or hearings.
- audiographics — audiographic teleconferencing
- autoradiogram — autoradiograph
- backgrounding — Present participle of background.
- backwardation — the difference between the spot price for a commodity, including rent and interest, and the forward price
- bacteriocidal — Alternative spelling of bactericidal.
- baking powder — Baking powder is an ingredient used in cake making. It causes cakes to rise when they are in the oven.
- banderilleros — Plural form of banderillero.
- bandicoot rat — any of three burrowing rats of the genera Bandicota and Nesokia, of S and SE Asia: family Muridae
- basidiospores — Plural form of basidiospore.
- batting order — the sequence in which hitters will bat in a given game, determined in advance by the team manager.
- be hard going — If you say that something is hard going, you mean it is difficult and requires a lot of effort.
- bearing sword — a large sword carried for its owner by a squire or servant because of its size.
- beauty editor — the person in charge of a section of newspaper or magazine devoted to cosmetics, etc
- bermuda onion — a large white or yellow onion with a mild flavor, grown in Texas, California, etc.
- bidirectional — (of a printhead) capable of printing from left to right and from right to left
- bildungsroman — a novel concerned with a person's formative years and development
- billiard room — a room in a house, club, etc., where billiards is played.
- biodegradable — Something that is biodegradable breaks down or decays naturally without any special scientific treatment, and can therefore be thrown away without causing pollution.
- bird of peace — a dove.
- bitter almond — a variety of almond whose bitter seeds yield hydrocyanic acid upon hydrolysis
- block diagram — a diagram showing the interconnections between the parts of an industrial process
- board meeting — a meeting of the board of a company or other organization
- boarding card — A boarding card is a card which a passenger must have when boarding a plane or a boat.
- boarding fees — fees paid for boarding at a school
- boarding pass — A boarding pass is a card that a passenger must have when boarding a plane or a boat.
- boardinghouse — a private house in which accommodation and meals are provided for paying guests
- bodvar bjarki — the greatest of Rolf Kraki's heroes, often fighting in the likeness of a bear: probably identical with Beowulf.
- boomerang kid — a young adult who, after having lived on his or her own for a time, returns to live in the parental home, usually due to financial problems caused by unemployment or the high cost of living independently
- borna disease — viral disease found in mammals, esp horses
- boron carbide — a black extremely hard inert substance having a high capture cross section for thermal neutrons. It is used as an abrasive, refractory, and in control rods in nuclear reactors. Formula: B4C
- boudoir grand — a domestic grand piano between 5 and 6 feet in length
- boundary line — a line marking one of the edges of a playing area
- boys' brigade — (in Britain) an organization for boys, founded in 1883, with the aim of promoting discipline and self-respect
- brace molding — keel1 (def 6).
- braggadocious — boastful
- branding iron — a long-handled metal rod with a stamp at one end, used for branding livestock, especially cattle, with a registered or recognized symbol or character to indicate ownership.
- branding-iron — an iron heated and used for branding animals, etc
- brassfounding — the practice of making things from brass
- break it down — stop it
- breechloading — loaded at the breech.
- breidha fjord — an inlet of Denmark Strait on the NW coast of Iceland.
- bridal shower — a party, held for a woman before her wedding, to which her friends bring gifts
- bridging loan — A bridging loan is money that a bank lends you for a short time, for example so that you can buy a new house before you have sold the one you already own.
- bring forward — If you bring forward a meeting or event, you arrange for it to take place at an earlier date or time than had been planned.
- bristol board — a heavy smooth cardboard of fine quality, used for printing and drawing
- broad-brimmed — (of a hat) having a broad brim
- bromide paper — a type of photographic paper coated with an emulsion of silver bromide usually containing a small quantity of silver iodide