18-letter words containing a, e, r, i
- avoirdupois weight — a British and American system of weights based on a pound of 16 ounces
- axis of revolution — an axis in a plane, about which an area is revolved to form a solid of revolution.
- background reading — reading of related works in order to get contextual information on a topic that you are intending to study or write about
- bargaining counter — A bargaining counter is the same as a bargaining chip.
- baritone saxophone — the second lowest instrument in the family of saxophones
- barium thiosulfate — a white, crystalline, water-insoluble, poisonous solid, BaS 2 O 3 ⋅H 2 O, used chiefly in the manufacture of explosives, matches, paints, and varnishes.
- bats-in-the-belfry — a hairy Eurasian campanulaceous plant, Campanula trachelium, with bell-shaped blue-purple flowers
- battery eliminator — eliminator (def 2).
- battery-eliminator — a person or thing that eliminates.
- beggar-my-neighbor — beggar-your-neighbor.
- behavioral science — any of several studies, as sociology, psychology, anthropology, etc., that examine human activities in an attempt to discover recurrent patterns and to formulate rules about social behavior
- behaviour patterns — the characteristic ways in which a person or animal acts
- benchmark position — a public service job used for comparison with a similar position, such as a position in commerce, for wage settlements
- bernoulli equation — Hydrodynamics. Bernoulli's theorem (def 2).
- bichromate process — any of several methods of photography in which the light-sensitive medium is alkaline bichromate associated with a colloid such as gum, albumen, or gelatin.
- bilateral symmetry — the property of an organism or part of an organism such that, if cut in only one plane, the two cut halves are mirror images of each other
- biodiversification — the process by which the diversity of plants or animals develops or is increased within a particular region or group of organisms.
- bioinstrumentation — the use of instruments, as sensors, to detect and measure certain body functions, as of persons in spaceflight, and transmit the data to a point where it is evaluated
- biological parents — the biological mother and father of a child
- biological therapy — biotherapy
- biological warfare — the use of living organisms or their toxic products to induce death or incapacity in humans and animals and damage to plant crops, etc
- birds of a feather — If you refer to two people as birds of a feather, you mean that they have the same interests or are very similar.
- biz-core stability — (security) Internet security products which secure the business core.
- black lives matter — a political and social movement originating among African Americans, emphasizing basic human rights and racial equality for black people and campaigning against various forms of racism. Abbreviations: BLM, B.L.M.
- blackwater rafting — the sport of riding through underground caves on a large rubber tube
- blissful ignorance — unawareness or inexperience of something unpleasant
- bloodbrain barrier — a layer of tightly packed cells that make up the walls of brain capillaries and prevent substances in the blood from diffusing freely into the brain: passage across the cell membranes is determined by solubility in the lipid bilayer or recognition by a transport molecule.
- board of directors — A company's board of directors is the group of people elected by its shareholders to manage the company.
- board of education — a group or agency with responsibility for education
- board of elections — a bipartisan board appointed usually by local authorities and charged with control of elections and voting procedure.
- board of examiners — a group of people who officially administer examinations
- borosilicate glass — any of a range of heat- and chemical-resistant glasses, such as Pyrex, prepared by fusing together boron(III) oxide, silicon dioxide, and, usually, a metal oxide
- bosnia-herzegovina — a country in SE Europe; a constituent republic of Yugoslavia until 1991; in a state of civil war (1992–95); Serbian and Croatian forces were also involved: mostly barren and mountainous, with forests in the east. Languages: Bosnian, Croatian, and Serbian (formerly all regarded together as Serbo-Croat). Religion: Muslim, Serbian Orthodox, and Roman Catholic. Currency: marka (pegged to the euro). Capital: Sarajevo. Pop: 3 875 723 (2013 est). Area: 51 129 sq km (19 737 sq miles)
- brazilian rosewood — a Brazilian tree, Dalbergia nigra, of the legume family.
- brazilian sapphire — a blue variety of tourmaline used as a gem: not a true sapphire.
- breach of security — an act that violates a country, area, or building's security measures
- bread and circuses — something offered as a means of distracting attention from a problem or grievance
- break the internet — to cause a large number of people to attempt to access the internet
- break your silence — If someone breaks their silence about something, they talk about something that they have not talked about before or for a long time.
- breathing exercise — an exercise intended to promote effective and healthy breathing and breath control
- brewer's blackbird — a blackbird, Euphagus cyanocephalus, of the U.S., the male of which has greenish-black plumage with a purplish-black head.
- bring-and-buy sale — A bring-and-buy sale is an informal sale to raise money for a charity or other organization. People who come to the sale bring things to be sold and buy things that other people have brought.
- broadcasting house — any of a number of buildings in the UK from which the BBC broadcasts or has broadcast
- broken twill weave — a twill weave in which the direction of the diagonal produced by the weft threads is reversed after no more than two passages of the weft.
- building materials — materials such as bricks, cement, timber, etc
- butler's sideboard — a sideboard, often with a fall front, having on its top a china cabinet with glazed doors.
- c-reactive protein — a globulin in the blood produced by the liver in response to inflammation
- cabernet sauvignon — a black grape originally grown in the Bordeaux area of France, and now throughout the wine-producing world
- cabinet government — parliamentary government.
- calcium propionate — a white, water-soluble powder, CaC 6 H 10 O 4 , used in bakery products to inhibit the growth of fungi.