15-letter words containing a, p, r, i
- arms inspection — the official checking of a country's weapons and other military equipment, usually to check that international agreements have been respected
- artillery plant — any of various tropical urticaceous plants of the genus Pilea, such as P. microphylla, all having stamens that discharge their pollen explosively
- asset-stripping — If a person or company is involved in asset-stripping, they buy companies cheaply, sell off their assets to make a profit, and then close the companies down.
- astrophysically — from an astrophysical point of view
- astrophysicists — Plural form of astrophysicist.
- athletic sports — sports, esp track and field events, in which athleticism is required
- atmospherically — pertaining to, existing in, or consisting of the atmosphere: atmospheric vapors.
- australian alps — a mountain range in SE Australia, in E Victoria and SE New South Wales. Highest peak: Mount Kosciuszko, 2195 m (7316 ft)
- australian pine — casuarina
- autobiographers — Plural form of autobiographer.
- autobiographies — Plural form of autobiography.
- autolithography — a lithographic technique by which the artist draws or traces with a brush and pen directly on a stone or plate.
- automorphically — in an automorphic manner
- autoradiographs — Plural form of autoradiograph.
- autoradiography — the technique or process of making autoradiographs.
- autotetraploidy — the generation of the tetraploid state, created by the fusing of two nuclei from the same species
- autotrophically — through an autotrophic process
- away-going crop — a crop planted by a tenant that matures after the expiration of the tenancy and is rightfully the tenant's to harvest.
- back plastering — the introduction of partitions of lath and plaster between the inner and outer surfaces of a stud wall in order to improve the insulating properties of the wall.
- back projection — a method of projecting pictures onto a translucent screen so that they are viewed from the opposite side, used esp in films to create the illusion that the actors in the foreground are moving
- backup rotation — (operating system) Any system for re-using backup media, e.g. magnetic tape. One extreme would be to use the same media for every backup (e.g. copy disk A to disk B), the other extreme would be to use new media every time. The trade-off is between the cost of buying and storing media and the ability to restore any version of any file. One example is the Grandfather, Father, Son (GFS) scheme.
- bacteriophagous — Pertaining to the predation and consumption of bacterium.
- ballpark figure — approximate number
- banana republic — Small, poor countries that are politically unstable are sometimes referred to as banana republics.
- bandpass filter — A bandpass filter is a filter designed to pass all frequencies within a band of frequencies.
- bandstop filter — A bandstop filter is a filter designed to eliminate all frequencies within a band of frequencies.
- banking product — one of the various services offered by a bank to its customers: mortgages, loans, insurance etc
- baptism of fire — If someone who has just begun a new job has a baptism of fire, they immediately have to cope with very many severe difficulties and obstacles.
- bargaining chip — In negotiations with other people, a bargaining chip is something that you are prepared to give up in order to obtain what you want.
- barium peroxide — a gray-white powder, BaO2, used as a bleach and in making hydrogen peroxide
- barium sulphate — a white insoluble fine dense powder, used as a pigment, as a filler for paper, rubber, etc, and in barium meals. Formula: BaSO4
- battleship gray — a subdued bluish gray.
- bear comparison — to be sufficiently similar in class or range to be compared with (something else), esp favourably
- bias (ply) tire — a motor vehicle tire having a foundation of plies of rubberized cords in a crisscross pattern of lines diagonal to the center line of the tread
- biblia pauperum — any of the picture books illustrating Biblical events and usually containing a short text, used chiefly in the Middle Ages for purposes of religious instruction.
- bibliographical — a complete or selective list of works compiled upon some common principle, as authorship, subject, place of publication, or printer.
- billiard parlor — poolroom (def 1).
- biobibliography — a bibliography containing biographical sketches of the authors listed.
- biostratigraphy — the examination of the ages of rock strata by using fossils
- bipartite graph — complete graph
- birch partridge — ruffed grouse
- bird of passage — If you refer to someone as a bird of passage, you mean that they are staying in a place for a short time before going to another place.
- black operation — a covert and undocumented military operation
- bladder campion — a European caryophyllaceous plant, Silene vulgaris, having white flowers with an inflated calyx
- blasting powder — a form of gunpowder made with sodium nitrate instead of saltpeter, used chiefly for blasting rock, ore, etc.
- brachial plexus — a network of nerves in the armpits and neck, innervating the shoulders, arms, and hands.
- brachiocephalic — of, relating to, or supplying the arm and head
- braille display — (hardware) (Or "refreshable braille display", "refreshable display") An electromechanical device that renders braille with tiny, independently controlled pins used to represent the state of dots in braille cells. Each pin, in its "on" state, raises above the top of its hole in the screen; in its "off" state, it drops below the top of its hole. Older systems used tiny solenoids to control the state of the pins; modern systems are piezoelectric. Typical dimensions of a braille display are 1 line of 40 cells, each cell of two-by-eight dots.
- braille printer — (printer) (Or "(Braille) embosser") A printer, necessarily an impact printer, that renders text as Braille. Blind users call other printers ink printers.
- branchial pouch — one of a series of rudimentary outcroppings of the inner pharyngeal wall, corresponding to the branchial grooves on the surface.